"Rulers make bad lovers
You better put your kingdom up for sale"A monarch's romantic choices are directly linked to everything going to hell thereafter. Usually, this is for one of three reasons:
— Fleetwood Mac, "Gold Dust Woman"
- They're having so much fun with their paramour, they forget about the actual ruling part.
- It's an extramarital affair or some other sort of slap in the face, and it makes them a lot of enemies. (Common case: it interferes with an Arranged Marriage and disrupts everyone's plans for inheritances, alliances and succession.)
- Their significant other starts to exert an influence on government policy, and causes problems either deliberately or through simple selfishness.
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Anime and Manga
- In Sailor Moon, particularly in the manga, Serenity and Endymion's love affair resulted in the fall of the Moon Kingdom via Green-Eyed Monster - when Queen Metaria showed up offering power, Beryl jumped at the chance, rallying the people of Earth to follow her in revolt by claiming Endymion's relationship with Serenity meant he was betraying Earth in favor of the Moon Kingdom. When Endymion rejected her, she killed them both.
- Magic Knight Rayearth: Any details are a giant spoiler. When the Pillar falls in love, the world of Cephiro is literally ruined, as in, overcome by monsters and natural disasters because she is not putting absolutely 100% of her concentration on it. She summons the Magic Knights to kill her so it doesn't get worse.
- Twelve Kingdoms: the empress Jokaku went insane with love for her advisor, Keiki, and slaughtered or exiled all other women from the kingdom. Being that the state of the kingdom is directly dependant on the competency of the ruler in this series, things went downhill very quickly.
- What's worse is that this happened four times according to the backstory. You'd think he would have carved his face in after the first time...
- In Mobile Suit Gundam SEED Destiny Yuna Roma Seiran tries to use this trope to convince Cagalli to break off her engagement to Athrun and marry him instead. It nearly works until her brother disagrees
- One of the Sandman books recounts the story of Dream's love affair with queen Nada. Unfortunately, the heavens didn't approve of a human having an affair with one of the Endless, and started destroying her kingdom's cities left and right until she broke up with him. At which point he sent her to hell, forever.
- In My Little Pony: Friendship Is Magic (IDW), Princess Celestia discovered a portal to the Mirror Universe and fell in love with its version of King Sombra (here a heroic king instead of a tyrant). Their affair had repercussions because keeping the portal open destabilized the two worlds and Celestia was too distracted to rule, to the point where Princess Luna had to disguise herself as her to prevent the citizens from thinking Celestia had abandoned them. For the good of both worlds, the portal was closed, separating the two.
- The above Sailor Moon example is noted in White Devil of the Moon. Nanoha, who in this fic is the reincarnation of Princess Serenity, calls out Queen Serenity for allowing her daughter to do everything that she did, noting that in addition to the above consequences, the princess was placing herself in danger of coming to harm and sparking an international incident, and potentially allowing Endymion to seize control of the Moon Kingdom through marriage.
- In Of White Trees And Blue Roses, Rhaegar Targaryen was very aware of how badly things could turn out after his abduction of Lyanna Stark, particularly after hearing of his father's execution of the Northern lords. Other characters had also thought to themselves (or voiced their opinions on) just how bad the idea really was.
- This is brought up in The Familiar of Zero fan fiction Jus Primae Noctis, but ultimately averted. It is not love that nearly dooms the realm, but ambitious traitors.
- The My Little Pony example below is expanded upon in The God Empress of Ponykind; the love poison was a concoction of Sombra to get the king and queen of the Crystal Kingdom into a vulnerable position where he could kill them, allowing him to take the throne for himself and eventually ascend to Daemon Princehood.
Live Action Film
- Star Wars: Anakin Skywalker is torn between his love for Padme Amidala and his duties as a member of the celibate Jedi Order. Darth Sidious manages to manipulate Anakin's emotions to corrupt him, bringing about the downfall of the Jedi Order, the Galactic Republic and the rise of the tyrannical Empire in its stead.
- Dido and Aeneas in The Aeneid. According to Virgil, their short fling caused, much later, the Punic Wars. Let this be a lesson to all Good Romans to never put love before duty.
- Guinevere and Lancelot of the Arthur mythos are a classic example.
- Though it wasn't exactly love per se - Arthur and his Half-Sister Morguese counts since it produced Mordred.
- Antony and Cleopatra from the Shakespearean play, which is based on historical records of just how bad this relationship was. Caesar—Cleo's previous paramour was accused of letting his love for the Egyptian Queen cloud his judgement.
- Older Than Dirt—bad policy (and subsequent Divine Wrath) in the Old Testament is often blamed on the influence of foreign wives.
- King David's adultery with Bathsheba nearly ruined the rest of his life with his kingdom racked with intrigue and civil war, although this is attributed in The Bible to God's punishment rather than a natural consequence.
- It's made explicit with David's son, Solomon. All his famous wisdom didn't do him much good when he started thinking with his other head and taking wives from other kingdoms who swayed his heart away from God, thus setting his kingdom up to fall.
- From the Deryni novels by Katherine Kurtz: Imre, the last Festillic king, indulges in an incestuous affair with his sister Ariella, which (aside from being incestuous) distracts him from marrying and producing a legitimate heir. On top of that, Ariella is no force for moderation or mercy, and Imre is a weak man who allows himself to be swayed by her.
- A Song of Ice and Fire:
- Cersei and Jaime. It starts as total squick when you learn how young they were when they... um... escalated their relationship, but the results almost two decades later are, arguably, even more distressing: this illicit relationship contributes massively to the series' instability and multi-stage civil war.
- The third book sees Robb Stark and Jeyne Westerling (or Talisa Maegyr in the television series); of course, the realm has already gone to hell by that point, but when the whole fiasco has played out, it's worth a couple of circles.
- Fifteen years before the events of the first book Robert Baratheon led a rebellion that ended the Targaryen dynasty after the already married Prince Rhaegar disappeared with Robert's fiancee Lyanna Stark.
- Ultimately revealed that Magnificent Bastard Littlefinger engineered the War of Five Kings with one of the goals being the exile/death of Ned Stark so that he could make a play for Catelyn Stark, who he'd loved as a young man. Boy, did that go wrong. But, hey: she had a daughter! Nothing potentially splody there, either.
- Ser Barristan finds himself pondering all the various kings and princes who acted on their own feelings and unwittingly brought misery on the realm. He also reveals The Mad King would have rather wed Joanna Lannister than his sister Rhaella. The implication being Aery's subsequent madness served to fuel his envy of his childhood friend Tywin Lannister to the point of hatred.
- Historically, the case of the oft-rumored relationship between Queen Naerys and Aemon the Dragonknight is complicated. It didn't seem to cause too many issues while they were alive (presumably because Aemon the Dragonknight is an actual heroic figure for a change). However, after they were dead, the rumor that Aemon was actually the father of Naerys's son Daeron was the reason Daeron's half-brother Daemon Blackfyre gave for rebelling against Daeron's rule and trying to claim the throne. This led to more than a century of war.
- Having said that, this civil war may have been ostensibly triggered by those rumours, but King Aegon Targaryen, the fourth of his name, better known to all as "The Unworthy", was actually the root cause. To the point that many historians of the Seven Kingdoms subscribe to the view that he spread those rumours about his sister-wife and brother himself. Worse, he took mistresses from any noble House willing (or unwilling) to hand him their daughters to try getting on his good side — he also particularly enjoyed finding rival Houses to take daughters from. Which resulted in a lot of highborn bastards being born from such goings on. All of whom he legitimized before his death, just to spite Daeron and the memory of his siblings. None of this would go on to directly impact the events in the war that broke out and increase its ferocity and duration at all, of course... Oh, heavens, of course not! Lesson: unbridled lust in a spoiled brat of a king? Not good.
- The nobles (and, perhaps more importantly, his wife) in Christopher Marlowe's play Edward II claim this as their reason for having the king offed: he was spending too much time with his... um... friend Piers Gaveston, a mere commoner.
- Similarly, there's undertones of this in Shakespeare's Richard II; Richard neglects his duties, his wife and more importantly the nobles in favor of a lavish good time with his favorites. Prior to the time in which Shakespeare's play is set, similar accusations had been leveled at Richard's close friend and maybe-lover Robert de Vere, in particular because this undercut the authority of his uncles.
- Subverted in Kushiel's Legacy. Moirin's relationship with Jehanne was said to make her a better ruler. Amusingly enough, it was the King (Jehanne's husband) who said this.
- King Edward IV's romantic follies contribute to the fall of the House of York in The Sunne in Splendour. He marries the beautiful Ice Queen Elizabeth Woodville, whose greedy, corrupt brothers are allowed to bleed the realm dry, but years later it's revealed that years before his marriage to Elizabeth, he had secretly agreed to marry an earl's daughter and then bedded her, which turned the agreement into a legal marriage. The testimony of the bishop who negotiated the agreement between Edward and the earl's daughter results in the marriage deemed null ab initio, Edward's children with Elizabeth judged illegitimate and their uncle Richard offered the crown.
- Phaedra's love for Ulfin in The Cup of the World. Made even worse when it's revealed that her love is the product of a faustian bargain.
- The Stone Prince is pretty much all about this trope; Prince Demnor starts a civil war in the backstory over his gay lover and is heading toward another one until said lover talks him into accepting an Arranged Marriage.
- Inverted in Legacy of the Dragokin. Daniar so focused on running her kingdom she neglected her husband. The former is doing great but the latter is lonely.
- Very narrowly averted in A.L. Phillips's The Quest of the Unaligned. Alaric, the newly discovered Crown Prince of Caederan, is deeply in love with the aesh (fire-mage) Laeshana. Unfortunately, the law requires that the Crown Prince must marry an unaligned mage, in order to preserve the balance between the four elements. It briefly seems that Alaric will have to choose between giving up Laeshana and marrying someone he does not not love, or breaking his nation's laws and starting a civil war. Fortunately, he is able to Take a Third Option, using the Prince's Crown to actually change Laeshana's magical nature, transforming her into an orah, which are elementally unaligned
- Titus Caesar's affair with Queen Berenice is mentioned in several of the Marcus Didius Falco novels. The lovers get compared to Antony and Cleopatra, and Falco notes dryly that because of historical precedent, Romans get nervous when their leaders fall for exotic beauties.
- Shown to be part of the reason everything goes down the drain in the realm of the Tiste in the Kharkanas Trilogy, the prequel to the Malazan Book of the Fallen series. Various factions in the realm want Mother Dark, their queen turned goddess, to find herself a husband for the sake of propriety, and to set aside her Consort, Lord Draconus. In this case, though, it is not Mother Dark's love for her Consort that ruins things, but Lord Draconus's love for her, as it's implied that he is actually the creator of the Tiste as a race and thus fell in love with his own creation. So neither does Mother Dark bother to do something about the situation, nor will Lord Draconus step down from his position; no, instead, to prove his devotion, he commissions a gift for Mother Dark that ends up causing civil war, the sundering of their whole realm and a war on the concept of Death itself. Nice Job Breaking It, Hero!.
- Under Heaven by Guy Gavriel Kay is a fictionalized account of the emperor Xuanzong listed under truth in television. The emperor's love for his consort leads him to name her cousin prime minister, and his poor handling of an ambitious and powerful general leads directly to a civil war.
- In Dune, the Bene Gesserit regarded love as a dangerous emotion and a weakness. Hence, when Jessica fell in love with Duke Leto Atreides and gave him a son instead of a daughter which the Bene Gesserit wanted for their Kwisatz Haderach plan, it went into disarray because the son, Paul, became Kwisatz Haderach who is born too early which resulted to an instability in the realm brought by the Fremen's jihad. However, Paul foresaw this because this instability is necessary to keep humanity from getting extinct and later, his son, Leto II takes the reins to be Necessarily Evil for humanity's survival. Of course, the Bene Gesserit never know this and blame Jessica, Paul and Leto II for the mess that they're in.
- In Dune Messiah, Paul Atreides's marriage with Princess Irulan Corrino is strictly political as he's only in love with his Freman concubine, Chani, who will provide his heir. After being coerced by several conspirators, Irulan becomes jealous and drugs Chani in order to delay her pregnancy. Though Chani did get pregnant, she died after giving birth to twins which Irulan regretted it later on. As a result, Paul went into an self-imposed exile after going blind in an assassination attempt, though he did foresaw it, and his Empire is in the hands of his sister, Alia, who slowly succumbs to the possession of their late grandfather, Baron Vladimir Harkonnen.
Live Action TV
- Also shows up in Rome, where Anthony and Cleopatra are having so much fun drinking, screwing, getting high, cross-dressing, etc (yeah, it's that kind of show) that they don't notice till the last minute that Octavian's coming to pwn their asses.
- Since The Tudors is about Henry VIII, this shows up here when he throws England into political and religious turmoil in order to be with Anne Boleyn.
- Kaamelott: Boy does Arthur run into this one. By falling for the Manipulative Bitch wife of one of his knights, he ensures that the gods abandon him, that each of the knights of the Round Table thinks he can run the country better, and generally gives up on the idea of a unified kingdom.
- Notably averted in Merlin (2008) with Gwen. While Uther and Agravaine argue that marrying a commoner would weaken Camelot (as opposed to marrying for political ties which would strengthen its position) Gwen turns out to be the most competent Camelot monarch in the show, successfully rooting out a traitor in her first episode as Queen. She eventually becomes Arthur's heir and Queen Regnant of Camelot.
- And then Word of God has it that after Arthur's death she reigns over the Golden Age of Camelot and lifts the ban on magic (heavily implied when she figures out that Merlin has magic and reacts with joy at the revelation).
- Game of Thrones:
Petyr Baelish to Sansa Stark: How many tens of thousands had to die because Rhaegar chose your aunt?
- The love affair between Lyanna Stark and Rhaegar Targaryen, aside from producing Jon Snow, produced a mass-scale war that killed thousands of people and ended the Targaryen dynasty, as well as having other far-reaching consequences down the line.
- By marrying for love, Robb angers the Freys, who join with the Boltons to kill him and divide his kingdom between them.
- Lysa Arryn's love for Petyr Baelish led her to poison Jon Arryn, an act that eventually snowballs into the War of the Five Kings.
- In The Crown (2016), the shadow of Edward VIII's abdication for Wallis Simpson casts a shadow over the Windsors almost as dark as World War II. Elizabeth had to fight for her marriage to Philip because he was a less pedigreed royal than herself, and when Margaret wants to marry a divorced commoner, her mother and Tommy Lascelles go through all sorts of machinations to keep it from happening, which ends in heartbreak.note
- Lampshaded in Elton John's Aida, based on Verdi's opera. The Nubians' plan fails due to Aida's love for Radames, and the character who had looked to her for hope for their enslaved people sings a Dark Reprise of the song where he'd first identified her as the princess.
"There is a time, there is a place, where love should conquer allThe rest of life is pushed aside as truth and reason fallBut only if that selfishness can lead to something goodI thought I knew you, Princess, but I never understoodI don't know you!I don't know you..."
- This is the reason of why Liu Kang refuses to become Edenia's king, alongside Kitana, in his ending in Mortal Kombat 4.
- In the EVE Online metagame, the Tribute War was partly started by one of the CEOs of NCDot starting a liaison with the head of a more aggressive alliance, and the latter force started a war with the CFC (an alliance bloc that included Goonswarm). Furthermore, NCDot collapsed in part because the other CEO of NCDot hadn't really been interested in joining in this mess in the first place, and when the war turned against NCDot, the alliance's internal politics grew more and more toxic until finally the two sides split apart completely.
- This has happened in some of the Fire Emblem games, particularly in the Jugdral, Elibe, and Tellius sagas.
- Tales of the Tempest: The Leimornean Queen and Pope getting married almost ruined the realm due to racism against the Leimorneans. The pair decide to separate with a child each, but then the Leimornean city and castle were both attacked and The Queen was killed, leading to a second near-destruction when The Pope rounds up thousands of Leimorneans to convert their Life Energy into Life Magic to resurrect her.
- Yet another of the many risks to a ruler in Crusader Kings. An Arranged Marriage falls apart because one the two falls in love with someone else, the marriage alliance is shattered when the pope grants a divorce, and suddenly the previously allied families are free to go for each other's throats or be devoured by neighbors that didn't dare face both, but can take on one.
- In The Gamer's Alliance, Sultana Razia al-Saif ends up having an affair with Count Belial de Ardyn, and they genuinely fall in love but have to keep their affair a secret because the Sarquil tribes and the court, who follow the rigid religious teachings of the Old Ways, would never accept their Sultana marrying a foreigner. However, the affair doesn't escape the eyes of the Sultana's twin sister, Emira Adela, who has also set her eyes on Belial, but Belial rejects her in favour of Razia. Adela doesn't take rejection well and, coupled with other things related to her sister's political moves, eventually challenges Razia to a duel which ends in Razia's death and Adela ascending the throne. This begins a chain of events which leads to the exile of Razia's son Khalid and his supporters, the Clergy of Artemicia rising to power thanks to Adela backing them up and forcing the Sarquil to convert to the new faith, and Adela's sorcerous accomplice Iblis al-Djinn becomes Grand Vizier. It leads to both the rise of the Sultanate of Karaganda but turns the Sarquil nation corrupt and decadent until Khalid returns with the Grand Alliance to dethrone Adela in a daring coup. The resulting battle weakens the sultanate enough so that the demons invade the divided land by surprise and eventually take over the sultanate, forcing the Sarquil into exile. All of this took place because both Razia and Adela simply fell in love with the same man.
- Happens a lot in Girl Genius.
- The Hero Bill Heterodyne marries the Mad Scientist's Beautiful Daughter Lucrezia Mongfish - who ends up destroying Castle Heterodyne, killing her infant son in the process, and becoming a world-conquering Super Villain. It's heavily implied that Bill didn't notice the warning signs of Lucrezia's megalomania because of his love for her.
- Baron Wulfenbach is extremely concerned about Gil's devotion to Agatha, and what it might mean for the Empire once Gil inherits it. He was right to be worried. Cut to two-and-a-half years later, during which time the Baron has been stuck in the timestop, Agatha has been missing, and Gil has been in charge of the Empire. Or what's left of it. He's devoted the entire time to trying to free Mechanicsburg from the timestop, in the hope of freeing Agatha, and he's built multiple fifty-foot tall statues of her around the valley for some bizarre reason. There's not a great deal of Empire left, now, and most of it is at war with itself.
- As Wooster puts it - "His focus is perhaps less... er... widespread than his father's." As in, it focuses entirely on Agatha.
- Tarvek is a more minor example. His original plans - to plant a fake 'Heterodyne girl', declare himself Storm King (a title which he does actually have a claim to), and then exploit an old prophecy to marry the Heterodyne and give himself even more legitimacy - end up going completely out the window when he falls in love with the real Heterodyne girl, Agatha. In this case, it's more 'Love Ruins The Plans For A Future Hypothetical Realm'.
- Agatha inadvertently ruins a lot of realms by accident, mostly because her suitors are idiots.
- One episode of My Little Pony: Friendship Is Magic had the Cutie Mark Crusaders discover their concocted love potion was a poisonous variant, which caused the collapse of a kingdom at some point in the past because of "too enamored to do crap" version of this trope.
Truth In Television
- Louis XV and Madame de Pompadour were falsely accused of this, for political reasons, to make him look like under the cat's paw. In fact her influence was very limited in foreign politics, she mainly focused on getting various relations cushy jobs. She did strongly influence the kings' patronage of various artists, and the Academie Française to a lesser degree.
- Lola Montez, the mistress of Ludwig I of Bavaria, has been credited with destroying his popularity and pretty much single-handedly causing a revolution.
- Ancient Chinese attitudes towards women being what it was, its historians very rarely had anything nice to say about wives and concubines of emperors:
- The last king of the Shang dynasty had a cruel concubine named Daji, who dragged the entire kingdom into senseless debauchery, cruelty and bloodshed.
- The next dynasty didn't learn the lesson: one late Zhou emperor got his fool ass invaded because he'd keep Crying Wolf to entertain his concubine, so his disgruntled troops refused to mobilize when a real emergency hit.
- For varying values of "ruin" (there's still no consensus among historians), Emperor Wu Zetiannote started out as a concubine, (supposedly) murdered her way up the ladder until she was made head wife, and then forced her own husband and son into early retirement to sit on the throne herself. While this did briefly interrupt the Tang dynasty and resulted in a Reign of Terror, she also made a lot of significant positive reform—from her reign onward, the Chinese civil system was based much more on merit than on your lineage or connections.
- Emperor Xuanzong (reigned 712-756) spent a whole lot of his later reign with his beautiful consort Yang Guifei and passing out all sorts of high offices to her friends and family. Little details like national defense were neglected right up until the inevitable rebellion by a cocky general. The poor consort didn't survive the evacuation, as what troops Xuanzong had left demanded her scapegoat's head.
- The Dowager Empress Ci Xi of the Qing dynasty was accused of wanting to be the next Wu Ze Tian and at the very least indirectly putting the final nails in the coffin of the Qing dynasty. (She did try to reform, but by then it was too late.)
- The relationship between Emporer Ai of the Han dynasty and Dong Xian is a gay male example. Ai's extreme favoritism of Dong Xian angered many of his officials, some of whom he had executed for complaining about Dong's power.
- Henrietta Maria the wife of Charles I of England,Scotland and Ireland. Besides being a French Catholic in a Protestant Kingdom, she continually advised him to take actions that, when discovered, led his opponents to regard Charles as untrustworthy and treasonous, such as repeatedly trying to get foreign (and also Catholic) nations to invade in support of Charles in the Civil Wars. She wasn't the only one, but Charles was so devoted to his wife he also made catastrophically bad political decisions when he heard rumblings she was threatened, including marching at the head of a troop of soldiers into the English Parliament to arrest his opponents, the event that made War all but inevitable.
- Henry VIII's attempts to divorce Katherine of Aragon and marry Anne Boleyn led to centuries of religious warfare in England.
- Ironically, Henry's actions in that case were an attempt to avoid this trope. Apparently, he did love Katherine but didn't think she could give him a son. He believed that his duty to England to provide an heir was more important than his duty to Katherine.
- And for all that, poor Anne got her head cut off anyway.
- Because by that point, Henry realized she couldn't give him a son, either, and had already begun courting Jane Seymour—who, as the saying goes, 'had the good fortune to bear a son and the good sense to die immediately afterward.'
- Procopius (perhaps an Unreliable Narrator) claims that Justinian's marriage to the notorious actress/prostitute Theodora brought about the ruination of the Roman/Byzantine empire.
- Others opine that Theodora and Justinian were a competent power couple.
- Judging from her famous quote during a particularly nasty chariot race riot about staying and possibly dying as queen rather then running as beggars, she encouraged her husband to try to quell the riot - one could suggest she was the more competent (or at least the bolder) of the two.
- Procopius' writings are often well known as they were some of the most complete extant writings of his time for centuries. Later research and discoveries showed how unreliable a narrarator he was, as he was a notorious sensationalist and collector of gossip in his time. While he is considered a highly Unreliable Narrator by modern standards, such was not only par for the course in his time, but such accounts were often the norm, as personal accounts were often more likely to survive than actual records. It also did not help that Theodora and Justinian were not popular rulers amongst the Greek dominated aristocracy of his time, so his writings often pandered to their prejudices while also putting in writing a lot of highly accurate facts on Justinian's reign. His works are still the most complete (if at times inaccurate in some of the details) extant account of Justinian's reign from that time period.
- Others opine that Theodora and Justinian were a competent power couple.
- One source of Mary, Queen of Scots' unpopularity as a ruler was her alleged tendency to get involved in numerous affairs (granted, her husband was known for being an abusive brute) that undermined her reputation, to the point where she was commonly referred to as a whore (via images of the Mermaid).
- Antony and Cleopatra VII, who probably deserve Trope Codifier status even though this is a very Truth-based trope. Interestingly, Antony didn't get in trouble for screwing Cleopatra — such things were rather expected of Roman leaders — but rather for letting her co-rule. Octavian pounced on the opportunity to slander Antony with some nasty PR (he was letting a woman rule!), got the Roman people to back a civil war against an otherwise wildly popular general and the rest is history. Ironically, Cleopatra's actions made political sense; sleeping with Caesar/Anthony kept Egypt independent for several decades after the Romans decided they wanted it.
- Marie Antoinette, the poor girl, was (and often still is) accused of influencing her husband inappropriately and substantially. In reality, we're talking a girl whose mother quite deliberately didn't allow much of an education (to the point that, almost 18 months after her wedding, her brother, Joseph II "Highly-Intelligent-But-Pollitically-Tone-Deaf" of Austria, had to explain what sex was when he, and nobody in the French Court itself, realised why the stalk hadn't visited yet, despite the royal couple regularly spending nights together). It's hard to say who was most educationally lacking, sheltered and clueless; she or her husband, Louis "I-Loved-Clockwork-Over-Politics-From-Very-Young" XVI. Yeah: it was less love that was the problem, and more the C18th European Court ideas about the education and socialization of children.
- Eric XIV of Sweden (reigned 1560-1568) managed to upset large parts of the Swedish nobility, including his own brothers, during his reign because of his sometimes violent insanity and paranoia. His decision to marry his mistress Karin Månsdotter, the daughter of a common jailkeeper, became the final straw that made it possible for his brothers and other political opponents to dethrone him.
- For a while, it looked like this was going to happen with Queen Elizabeth I of England (1533-1603) and Robert Dudley. He was universally hated and was generally supposed to have murdered his wife; the Queen's intimate relationship with him scandalized Europe and damaged her reputation. If she had married him, Elizabeth might have had a hard time holding on to her crown. Eventually, she decided to become the "Virgin Queen" and renounce marriage, but she kept her "sweet Robin" close by until he died in 1588.
- Edward VIII of England was on the verge of causing this. Subverted in that his abdication got rid of a King with fascist sympathies, and put on the throne King George VI, who - with the help of his wife, Lady Elizabeth Bowes-Lyon - listened to Winston Churchill and guided England through World War II. Love Saves The Realm?
- Although ironically - despite what The King's Speech tells us - Churchill didn't actually want the succession to be diverted. (Just Because, as far as is possible to see - he thought at the time it made a nonsense of the idea of monarchy. And George was also extremely - some might say, as he announced it as king before parliament had agreed on it - inappropriately eager to celebrate the achievements of Neville Chamberlain's peace treaty...)
- Edward IV married Elizabeth Woodville because of love instead of political reasons. This got him a lot of enemies within his own court, as she was not only completely inappropriate (was the widow of a Lancastrian soldier with two children), but she also did things like securing all the best jobs and marriages for her relatives. This helped cause the Earl of Warwick to fall out with Edward and try to overthrow him, as he felt that Edward wasn't following his advice.
- This actually counts as a subversion. Edward IV was out of power for barely a year before he got his shit together, gathered an army of Burgundians, sailed back to England, and killed virtually all of his enemies at Barnet and Tewkesbury, including Warwick, destroying the House of Lancaster as a political force in England for the next fifteen years.
- After Edward's death, it was alleged that his marriage to his queen was illegitimate due to a prior secret marriage to another woman (see The Sonne In Splendour above). The accusation was highly political and there is no surviving evidence of this marriage, but his many known mistresses may have helped sell the story. This resulted in his children being removed from the line of succession (with some of them being killed outright) and yet another war for control of England.
- Certainly the view of some people with regard to the growing (but usually very unofficial) influence of the Royal Harem in the late Ottoman Empire. Of course, the late Ottoman Empire had a great deal more problems than that. It wasn't called the Sick Man of Europe for nothing.