1. Karl Marx The philosopher, social scientist, historian and revolutionary

4. So what really is A Marxist? A Marxist has a certain kind of practice, a way of living and working, that we call being a Communist. A Marxist's thought is based on this daily practice, a science of logic called Dialectics. Thus, Marxism is both a theory and a practice. The theories of Marxism are based on a scientific method of thought called dialectical materialism; to be clear there is no one answer to a question -- theory is based on a particular set of conditions that are always finite, and thus, any theory is necessarily limited. To test the validity of theory, Marxists rely on empirical evidence as the criteria of truth. Using such a methodology Marx and Engels examined history, which lead them to explain theories on the class struggle, the basis of social relations through economics, and the form of society that would follow capitalism. These theories are not immutable truths, they follow something similar to the scientific method: a hypothesis that explains observable events; a hypothesis which remains valid only so long as it does not conflict with reality.