Solution:Louis Althusser, a French Marxist philosopher, is not considered a Fabian Socialist. Fabian Socialism is a form of democratic socialism developed in Britain in the late 19th century, advocating gradual social reforms rather than revolutionary change.
Prominent Fabian Socialists include G.D.H. Cole, G.B. Shaw, and Sidney Webb, who were part of the Fabian Society formed in 1884. Althusser, on the other hand, focused on structuralist Marxism and ideological state apparatuses, distancing himself from the evolutionary approach of Fabianism.