Feminisim didn't start in the 50s, though. I mean, Women Sufferage was like...1920. The idea of women venturing into non-typical feminine jobs was cemented during the world wars in a lot of cases (my grandmother built ammunition shells).
For that matter, I'm not sure I buy extremist insular movements always being the starting point. For instance, Black Panthers didn't exist until 1966, about a decade after the civil rights movement and long after the abolition of slavery.
The LGBT movement...never seen a violent "we're superior to straight people movement" from there. I've seen internal discrimination in there, sure (LG citing superiority over B; LGB citing superiority over T; T citing superiority over other T; L and G didn't get along that well 30 years ago before forming the alliance).