Marcuse was the one attributed to the phrase “Make Love Not War”.
Marcuse, Adorno, Horkheimer, et al formed the “Institute For Social Research” in Frankfurt, Germany. You Know Who kicked them out, and they were allowed to set up shop at places like Columbia and deah old Hahvahd.
They repaid their new home by trying to destroy it. Since the 1930s, not the 1960s.
I was in ROTC during that period, and our slogan was, "Make love and war."