 Numerous recent historians, particularly since the 1980s, now dismiss the claim as devoid of evidence, Morris, with others of the New Historians school, concur that Arab instigation was not the major cause of the refugees' flight.As regards the overall exodus, they state that the major cause of Palestinian flight was instead military actions by the Israeli Defence Force and fear of them.In their view, Arab instigation can only explain a "small part" of the exodus and not a "large part" of it.