Graham Wallas (31 May 1858 – 9 August 1932) was an English socialist, social psychologist, educationalist, a leader of the Fabian Society and a co-founder of the London School of Economics.
Born in Monkwearmouth, Sunderland, Wallas was educated at Shrewsbury School and Corpus Christi College, Oxford. It was at Oxford that Wallas abandoned his religion. He taught at Highgate School until 1885, when he resigned rather than participate in communion, and was President of the Rationalist Press Association.
Wallas joined the Fabian Society in April 1886, following his acquaintances Sidney Webb and George Bernard Shaw. He was to resign in 1904 in protest at Fabian support for Joseph Chamberlain's tariff policy. In 1894 he was elected to the London school board as a Progressive.
In 18 December 1897 he married the socialist writer Ada Radford. The following year they had a daughter May Wallas who despite diphtheria and flu went to Newnham College like her mother.
Wallas became chair of the board's school management committee in 1897, and until he was defeated in 1907 the encouragement of educational reform and the raising of academic standards in state schools was one of his main activities.
He was appointed a university extension lecturer in 1890 and lectured at the newly founded London School of Economics from 1895. In 1898 he published a biography of the early nineteenth-century utilitarian radical Francis Place. His most important academic writings were Human Nature in Politics (1908) and its successors The Great Society (1914) and Our Social Heritage 1921).