Associated with post WWII period, no narration, filmmaker mostly sits back and watches the world unfold with little interaction between the filmmaker and the subjects in the film, minimal influence and bias on the world from the director
Reaction to expository: issue of objectivity
"Fly on the wall" approach, Camera simply observes, minimal filmmaker interference
Minimal style, little extra music or voice over, available light (if possible)
Lightweight technology, 50's and 60's, "direct cinema"