%%* CrowningMomentOfAwesome: The Last Question
* DeathOfTheAuthor: One of Asimov's favorite stories, "The Martian Way", was a way of using his claustrophilia as an attack on Joseph [=McCarthy=]. In it, a [=McCarthy=] counterpart named "Joseph [[NamesToRunAwayFromReallyFast Hilder]]" is almost able to become Global Administrator at the cost of space development. Nuclear "proton micropiles" are used to produce energy almost for free, and are used in pumped steam rockets to colonize the solar system - so Hilder whips up [[YouCanPanicNow scare reports]] on how space travel will eventually turn the Earth into a desert. Asimov's Martians, being immune to SpaceMadness due to their upbringing as claustrophillic SpacePeople, are able to make a three-year trip to Saturn, retrieve a cubic mile of ice from its rings, and return in time to make a complete fool of a visiting bureaucrat who previously stated for the record that Earth cannot spare a single drop of its ''one and a half quintillion[[note]]'''1,500,000,000,000,000,000'''[[/note]] tons of water''. As an attack on [=McCarthy=], it flopped. As a modern-day attack on environmental alarmism, it ''works''. The ironic part is that ''Asimov was an outspoken environmentalist.''
* FanonDiscontinuity: ''Foundation and Earth'' is basically just an excuse for a big crossover with the Robots series and doesn't make much sense compared to the earlier Foundation books.
* HarsherInHindsight: "Trends", one of his earliest short stories, is really uncomfortable to read at any time from the 1980s onward. When it was written in 1939, the idea that a plurality of Americans would deny science outright in favor of religious fundamentalism, and be a powerful lobby, was ludicrous. Nowadays, the controversy shows up in state governments every few years. Moreover, in the story, [[spoiler:the mob comes to its senses after the hero risks his life to go into space]]. In reality, fundamentalists, being ''fundamentalists'', never change their mind no matter how much evidence they are confronted with. Asimov himself lived to see some of this: in the 1980s, he, along with several other scientists, wrote an essay presenting the facts and exhorting the public not to fall for creationism. [[FailureIsTheOnlyOption It didn't work.]]
%%* TearJerker: The Ugly Little Boy