Boy the 60s,70s...even 80s...40 years ago...I remember my Grandparents listening to Guy Lambardo...when I was a kid and the difference was only 30 years..music changed so much in the late 60sxand 70s...but alot of music was taken from older artists work 20s 30s...
The majic of early 1970's rock and it's influence-
Starting with the Beatles and the Rolling Stones in the sixties; then adding in the Vietnam War, and the sexual revolution, which also occurred at this time, I think the time frame of 1970-1975 created the majority of rock's geniuses, the likes of which probably won't be seen again. I use, for examples- Jimmy Hendrix, Pink Floyd, Yes, Elton John, Genesis, the Allman Brothers, Janis Joplin, Eric Clapton, Jethro Tull, Santana, and Neil Young, just to name a few. I think earlier (pre 1970) rock concerts of large attendance, such as the Beatles tours and Woodstock also had a profound influence on the social change during this time. What do you think?