AvatarSherrell HumphreyOn The Road To Rock Excess: Why The '60s Really Ended In 1973verified_publisherNPRAuthor Michael Walker says that by the end of the 1960s, you could fairly say there were two generations of baby boomers: those who had experienced that decade's peace-and-love era of music firsthand, and those who learned about it from their older brothers and sisters. "So when the early '70s got …