A subset of absolute idealism, British idealism was a philosophical movement that was influential in Britain from the mid-nineteenth century to the early twentieth century. The leading figures in the movement were T. H. Green (1836–1882), F. H. Bradley (1846–1924), and Bernard Bosanquet (1848–1923). They were succeeded by the second generation of J. H. Muirhead (1855–1940), J. M. E. McTaggart (1866–1925), H. H. Joachim (1868–1938), A. E. Taylor (1869–1945), and R. G. Collingwood (1889–1943). The last major figure in the tradition was G. R. G. Mure (1893–1979). Doctrines of early British idealism so provoked the young Cambridge philosophers G. E. Moore and Bertrand Russell that they began a new philosophical tradition, analytic philosophy.

Bernard Bosanquet was an English philosopher and political theorist, and an influential figure on matters of political and social policy in the late 19th and early 20th centuries. His work influenced but was later subject to criticism by many thinkers, notably Bertrand Russell, John Dewey, William James and Ludwig Wittgenstein. Bernard was the husband of Helen Bosanquet, the leader of the Charity Organisation Society.