1) Early documentary styles diverged in the 1910s, with some using reenactments like In the Land of The Headhunters and others using actual footage like The Rescue of the Stephansson Arctic Expedition. 2) In the 1920s, Robert Flaherty staged some scenes for Nanook of the North while Dziga Vertov believed the camera could capture reality more accurately than the human eye in Kino Pravda. 3) Technological advances enabled the French Cinema vérité style in the 1960s to capture events as they unfolded using handheld cameras on location.