 While most popular representations of the movement are centered on the leadership and philosophy of Martin Luther King Jr., some scholars note that the movement was too diverse to be credited to one person, organization, or strategy.Sociologist Doug McAdam has stated that, "in King's case, it would be inaccurate to say that he was the leader of the modern civil rights movement...but more importantly, there was no singular civil rights movement.The movement was, in fact, a coalition of thousands of local efforts nationwide, spanning several decades, hundreds of discrete groups, and all manner of strategies and tacticslegal, illegal, institutional, non-institutional, violent, non-violent.