Owenism is the utopian socialist philosophy of 19th-century social reformer Robert Owen and his followers and successors, who are known as Owenites. Owenism aimed for radical reform of society and is considered a forerunner of the cooperative movement. The Owenite movement undertook several experiments in the establishment of utopian communities organized according to communitarian and cooperative principles. One of the best known of these efforts, which were largely unsuccessful, was the project at New Harmony, Indiana, which started in 1825 and was abandoned by 1829. Owenism is also closely associated with the development of the British trade union movement, and with the spread of the Mechanics' Institute movement.

Utopian socialism is the term often used to describe the first current of modern socialism and socialist thought as exemplified by the work of Henri de Saint-Simon, Charles Fourier, Étienne Cabet, and Robert Owen. Utopian socialism is often described as the presentation of visions and outlines for imaginary or futuristic ideal societies, with positive ideals being the main reason for moving society in such a direction. Later socialists and critics of utopian socialism viewed utopian socialism as not being grounded in actual material conditions of existing society. These visions of ideal societies competed with revolutionary and social democratic movements.