political theory concerned with imagined socialist societies
Utopian socialism is the name for the early movements of socialism: They are based on the idea of an ideal state, and on shared property. They started before the revolutions of 1848. The true idea of socialism started after the French Revolution. The socialism movements can be claissified into several time periods; the first of these periods is called Utopian socialism, or early socialism.
Well known people who were part of Utopian socialism were Henri de Saint-Simon, Robert Owen, Charles Fourier, Pierre-Joseph Proudhon and Étienne Cabet.