The socialist political movement includes political philosophies that originated in the revolutionary movements of the mid-to-late 18th century and out of concern for the social problems that socialists associated with capitalism. By the late 19th century, after the work of Karl Marx and his collaborator Friedrich Engels, socialism had come to signify anti-capitalism and advocacy for a post-capitalist system based on some form of social ownership of the means of production. By the early 1920s, communism and social democracy had become the two dominant political tendencies within the international socialist movement, with socialism itself becoming the most influential secular movement of the 20th century. Many socialists also adopted the causes of other social movements, such as feminism, environmentalism, and progressivism. (Full article...)
Leninism is the political theory for the organization of a revolutionary vanguard party and the achievement of a dictatorship of the proletariat, as political prelude to the establishment of socialism. Developed by and named for the Russian revolutionary Vladimir Lenin, Leninism comprises socialist political and economic theories, developed from Marxism, and Lenin's interpretations of Marxist theories, for practical application to the socio-political conditions of the Russian Empire of the early 20th century.
The following are images from various socialism-related articles on Wikipedia.
Image 1Russian anarchist Mikhail Bakunin opposed the Marxist aim of dictatorship of the proletariat in favour of universal rebellion and allied himself with the federalists in the First International before his expulsion by the Marxists (from History of socialism)
Image 26The first anarchist journal to use the term libertarian was Le Libertaire, Journal du Mouvement Social, published in New York City between 1858 and 1861 by French libertarian communistJoseph Déjacque, the first recorded person to describe himself as libertarian. (from Socialism)
... that Marie-Thérèse Eyquem served in the government of Vichy France, and was later appointed a national secretary of the French Socialist Party?
... that following the ban of its labour unions in 1934, the Romanian United Socialist Party would rely on its youth and women's wings for political action?
Now try to substitute for the Junker-capitalist state, for the landowner-capitalist state, a revolutionary-democratic state, i.e., a state which in a revolutionary way abolishes all privileges and does not fear to introduce the fullest democracy in a revolutionary way. You will find that, given a really revolutionary-democratic state, state- monopoly capitalism inevitably and unavoidably implies a step, and more than one step, towards socialism!
For if a huge capitalist undertaking becomes a monopoly, it means that it serves the whole nation. If it has become a state monopoly, it means that the state (i.e., the armed organisation of the population, the workers and peasants above all, provided there is revolutionary democracy) directs the whole undertaking. In whose interest?
Either in the interest of the landowners and capitalists, in which case we have not a revolutionary-democratic, but a reactionary-bureaucratic state, an imperialist republic.
Or in the interest of revolutionary democracy—and then it is a step towards socialism.
For socialism is merely the next step forward from state-capitalist monopoly. Or, in other words, socialism is merely state-capitalist monopoly which is made to serve the interests of the whole people and has to that extent ceased to be capitalist monopoly.
There is no middle course here. The objective process of development is such that it is impossible to advance from monopolies (and the war has magnified their number, role and importance tenfold) without advancing towards socialism.
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— Vladimir Lenin, The Impending Catastrophe and How to Combat It, 1917