crash course in 1960s figures in culture

Yes, for those of you born far too recently and never got educated on those times, here is a crash course:

John Fitzgerald Kennedy - president USA, shot in head
Robert F. (Bobby) Kennedy - his brother, also shot
Martin Luther King Jr. - black guy who got shot
Mao Tse Tung - Chinese guy made lots get killed
Fidel Castro - same guy in Cuba as today!
Jimi Hendrix - played guitar in Seattle, heroin
Janis Joplin - singer, heroin I think too
Andy Warhol - painted some soup cans

what about syd barret and jacques derrida? They had way more cultural impact than then nobodies you're spouting off.