Depends on how you define the people, if you can.
As early as 1968, what they were
was already being debated.
The ones I think of, didn't all use drugs, and seemed to want to do a lot more menial labor than I'm interested in.
Fantasizing about farmwork still baffles me.
The diggers seem to be the classic example to me.
Burning man seems clearly related to their movement in many ways.
I saw the political organizations put together in this period and maintained.
Free clinics, journalism under extreme repression and so on.
Were hippies one group with one philosophy?
I don't think so.