[35amxn35]

It's more like "a group of people who absolutely hate to be told what to do by people they completely disagree with/have nothing in common with*". It's not a pyschological disorder, as it has to do with survival. Lack of defiance is probably a psychological disorder. Historically, those tensions were resolved with wars/civil wars/insurgents/civil unrest.

[kelseyfrog]

It's definitely a reactance trait. These folks become hostile and antisocial when asked to play by the rules. Keep an eye out for it - it's much more common than you think.