This is a very badly worded question. However I will attempt to answer it. Karl Marx, although by admission he was not, wrote heavily on the merits of communism which is an extreme form of socialism. He broke society down into two primary groups the Proletarians and the Bourgeois. He briefly touched on a third, the 'petty bourgeois' but hardly covered them in the communist manifesto which was one of the texts he is chiefly known for.
He is often regarded as the father of modern communism. He wrote about the workers, or proletarian, revolution in which the working class would absorb the bourgeois, or land/capital owning, class to create a classless society.
Marx's fails to provide any idea of a governmental structure in his writings but does allude to certain ideas that would be supported however these are widely debated so I will not go into them here.
Primarily he is regarded as the creator of modern communism. The best work to read would be 'The manifesto of the communist party' written by Karl Marx and Friedrich Engels.
Marx was never a president and never held any political/governmental office.
Karl Marx
Karl Marx with his theories on economocs, history, sociology and politics.
Karl marx was the founder of the idea of socialism. the Russian revolution was to free from the idea being applied.
Karl Marx Karl marx
Karl Marx
Karl Marx is famous for his contributions to the fields of economics, politics, and philosophy. His theories on capitalism and socialism have had a profound impact on the development of modern political thought.
Georg Wilhelm Friedrich Hegel, who created the theory of the dialectic, greatly influenced Marx, although Marx frequently disputed some on Hegel's theories.
Karl Marx
No, Karl Marx was not a positivist. Positivism is a philosophical approach that emphasizes empirical evidence and scientific method to understand the world, while Marx's theories focused on social critique and historical materialism. Marx believed in historical and dialectical materialism to analyze and critique capitalist societies.
No, Karl Marx is not single.
The stone age predated the theories of Karl Marx by tens of millennium, so no, they weren't.