The origins of the Weathermen can be traced to the collapse and fragmentation of the Students for a Democratic Society following a split between office holders of SDS, or "National Office", and their supporters and the Progressive Labor Party (PLP). During the factional struggle National Office leaders such as Bernardine Dohrn and Mike Klonsky began announcing their emerging perspectives, and Klonsky published a document titled "Toward a Revolutionary Youth Movement" (RYM).[1]