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.

[4] Wallas joined the Fabian Society in April 1886, following his acquaintances Sidney Webb and George Bernard Shaw.

[5] May was to publish editions of many of her father's works, including the 1940 collection Men and Ideas: Essays by Graham Wallas.

His most important academic writings were Human Nature in Politics (1908) and its successors, Great Society (1914) and Our Social Heritage (1921).

In The Art of Thought (1926), he drew on the work of Hermann von Helmholtz and Henri Poincaré to propose one of the first complete models of the creative process, as consisting of the four-stage process of preparation (or saturation), incubation, illumination, and verification),[8] which remains highly cited in scholarly works on creativity.