Theoryof Narrative Causality has these relationships to other tropes:

parents kids shares a parent with:
Rule Of Drama
Anthropic Principle
Finagles Law
Million To One Chance
The Good Guys Always Win
Underdogs Never Lose
Youngest Child Wins
Your Princess Is In Another Castle
parent child
Rule Of DramaYou Cant Thwart Stage One
''Duels Decide Everything
''Theory Of Narrative Causality
''Unspoken Plan Guarantee
''Evil Plan
''Superhero Paradox
You'll need to Get Known if you want to add or modify these relationships.