Complex sentence: Deane has identified five distinct phases of Laski's thought that he never integrated: pluralist (1914--1924), Fabian (1925--1931), and Marxian (1932--1939).
Split into simpler sentences: Deane has identified five distinct phases of Laski's thought that he never integrated. The first three were pluralist (1914--1924), Fabian (1925--1931), and Marxian (1932--1939).