Till now I only knew of the end result - the wonderful book "Ways of Seeing." A semi-cult read in cultural/visual studies, in it he rethinks what seeing is - what advertising does, what art means, how reproductions affect the act of seeing and the way which visibility is a subjective process. The originality is that he does this by using images, reproductions and collages as much as words and text. Similarly in the televised version of "Ways of Seeing" he uses editing techniques (as if switching channels) and particular frames (filming the film crew filming him) as much as his voice-over to get his questions across.
Here is a wonderful articulation of the absurd adoration western culture has for authenticity:
In this particular extract Berger looks at (pun intended) ideas of hyperreality and consumption in the world of advertising. At times a little simplistic (forty years have gone giving the issue a bunch of new ways to think about it) but his questions are still just as relevant today as they were 40 years ago: