The International Socialist Movement is a Trotskyist current inside the the Scottish Socialist Party. It was formed after Scottish Militant Labour left the Committee for a Workers' International. Trotskyism is the theory of Marxism as advocated by Leon Trotsky. ... This article deals with the Scottish Socialist Party that was formed in 1998. ... Scottish Militant Labour (SML) were a minor political party operating in Scotland in the 1990s. ... The Committee for a Workers International (CWI) is an international association of Trotskyist Parties. ...

The ISM has developed strong relationships with other currents in the socialist movement. It is a permanent observer of meetings of the United Secretariat of the Fourth International. The United Secretariat of the Fourth International (USFI) is the largest Trotskyist international organisation. ...