The Progressive League was a British organisation for social reform and the promotion of scientific humanism, founded in 1932 by H. G. Wells and C. E. M. Joad under the name "Federation of Progressive Societies and Individuals" (FPSI).
One of the first of a generation of non-governmental organisations, as influenced by Wells' idea of the "open conspiracy", the organisation had its heyday in the 1930s and 1940s, advancing liberal and humanistic approaches to many of the issues that animated the concerns of contemporary intellectuals and freethinkers. The organisation became quieter in the later part of the 20th century as numerous other organisations sprang up as specialised advocates for many of the same causes – many of which had originally spun-off from the League, such as the Marriage Law Reform Society. At the same time, within the humanist movement, other organisations such as the British Humanist Association became prominent as broad platform campaigners for social reform.