Whenever your nearest white Boomer gets cocky about supposedly paving the way for America to move forward, remember (or remind them you know) that the Baby Boom was after the war, when the soldiers returned, so it started in ‘46. The Boom tanked in '65, the start of X. The Civil Rights Act was passed in '64. '55 is right in the centre of the Boom , so your average (median) Boomer was about NINE YEARS OLD when it passed.

Malcolm X, Yuri Kochiyama, and Martin Luther King, Jr were all Silent Generation. To be Silent Generation in '64, all you had to do was be over 19.

So, it was largely the actions of the Silent Generation ('25-'45)

(Be aware a lot of people might have estimates that differ one to two year, although for Boomer, that makes no sense, as the Baby Boom was a measurable statistical event)