Where did socialism originate?

Although socialist models and ideas espousing common ownership have existed since antiquity, the modern concept of socialism evolved in response to the development of industrial capitalism. Count Henri de Saint-Simon (17 October 1760--19 May 1825) is regarded as the first individual to coin the term socialism. He was fascinated by the enormous potential of science and technology and advocated a socialist society that would eliminate the disorderly aspects of capitalism and would be based upon equal opportunities.

Note that communism is only one particular form of socialism.