“Humans have been “using” for as long as there have been humans. But, you know that, doncha?”
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Yes, of course, but it was pretty much limited to degenerate skid-row adults. When I went off to the Univ. of Tennessee, back in 1963, no one mentioned, much less used, drugs. We did, however, drink a lot.
Maybe you lived in a different society.
I was off to the University of California in 1964. There was ALL kinds of stuff. I got more "education" watching all the political happenings than I did in classes. Lots of drugs there. The mantra of the '60 was: drugs, sex and rock and roll. You remember that too.
I came home on the weekends as my father was ill. He didn't live quite long enough to see me graduate. HE was far, far more important than whatever was going on at the campus.