The Revolution Business examines the role of United States intelligence agencies in the recent revolutionary movements such as the Arab Spring and others by the use of "Revolution Consultants." Of particular interest is a Serbian man Srđa Popović, who formed an organisation called Отпор! (Otpor) which tought "non-violent struggle" in the overthrow of Slobodan Milošević in Serbia during the 1990s, and which has now gone on to inspire a new generation of activists. However, some political commentators like William Engdahl are convinced that Otpor is financed by the United States and has ties to intelligence agenices, also having dubious funding from sources such as the Rand Corporation, the Department of Defence, as well as various fronts such as the National Endowment for Democracy (NED), the International Republican Institute (IRI), the US Institute of Peace and the Ford Foundation--all of which have a long history of collaborating with the Pentagon, the State Department and the CIA in destabilising movements and usurping popular uprisings, removing their teeth.