Like most right-thinking people, I love LeGuin's "The Ones Who Walk Away from Omelas"... but it doesn't half attract Bad Takes.
Hint: Omelas is where we live, more or less, and the thing you'd definitely do if you lived there? It's what you're doing right now as you live your life, not your so-brave/noble/principled/rational [delete as appropriate] words.
(Not subtooting anyone on here but, seriously, never read blog posts or comments about Omelas.)
@ghost_bird Total side note: One semester, I read Omelas out loud to my first-year composition students on the last day of class. They were absolutely _riveted_. Such a good story.
@okiekiki My other favourite LeGuin story is "The Author of the Acacia Seeds" - which might also be good for first-year composition students, now I think of it.