Social movements are of critical importance in bringing about social change nay development. Social movements are large groupings of individuals or organizations that focus on specific political or social issues. Deprived groups consisting of peasants, tribals, Dalits, backward classes, youth, and women have been organizing themselves to fight against inequalities, discrimination, and deprivation. The United States has a long tradition of social movements that have sparked major changes in bringing about social change and development. The movements have been of various types as labor, civil rights, Black nationalism, anti-globalization, environmental, etc. The French Revolution in the 18th century can be termed as a radical movement which brought about social change and development not only in France but also in Europe and in other nations. In the 19th century Europe, labor movements were based on Marxism, that is, based on the class struggle. Unification of Germany in 1990 and the collapse of Soviet Union are the two important events in Europe which brought about development in Europe. India too has witnessed several movements as Backward Classes, Nationalist, Dalits, Caste, Youth, Tribal, Farmers’, Environmental, and Women’s movements. The social movements as collectivities attempting to change the social order cannot be analyzed simply in terms of success or failure. Some have succeeded to reach the desired goals and others have failed. Failure may come as a result of ruthless suppression of the movement or through widespread apathy. A movement may wither away because very few take it seriously, and it does not develop enough power to force its program on society. Success is most apparent when a movement manages to have its power legitimized as authority.