I hadn't intended to post anything about Woodstock because (A) I didn't go and (B) it quickly grew into something it wasn't. But my friend Mike Powers (musician, magician and mathematician) sent this link and I believe this NYTimes photographer is someone who did go and who isn't misrepresenting what he saw there, which makes his ruminations valuable.
I'll have something else about the era shortly. Meanwhile, in his e-mail, Mike used the subject line "A 3 minute trip down memory lane" and I think that's a pretty good summary. It's worth the click.