I saw this in the early 70s (when I was 16), and despite the long slow set-up, meetings, riots, etc, once the desert section began all fell into context and I loved it. (Still do, it has aged very well.) Back then I was in what seemed to be a tiny minority. All criticisms seemed to concentrate on the lack of action and narrative. Happily I'm no longer in such a minority.

It deftly shows (in a somewhat prophetic way) the political splintering, unrest, confrontation, brutal repression, commercialisation and deception which lay ahead.

Appreciation for this magistral film has grown, and I'm glad about that.