Alan Watts was very influential to introduce Eastern philosophy in the West: https://en.wikipedia.org/wiki/Alan_Watts
The documentary 'Why not now?' is an excellent introduction to his ideas. One can feel the spirit of those times, including the hippie movement.
If that's not enough, there are plenty of mostly audio lectures by Watts here: https://www.youtube.com/user/alwaysinthenow/playlists
And Watts's original TV series: https://www.youtube.com/playlist?list=PL02D3110151849463
Voir aussi en français: http://revolution-lente.coerrance.org/eloge-de-l-insecurite-alan-watts.php