Question

what are the basic principles behind karl marx's theory?

Answer 1

Marxism is a way of thinking critically, but it is not a “system”: “I have never established a ‘socialist system’”, Karl Marx wrote in his “Notes on Adolph Wagner's Lehrbuch der politischen Ökonomie” (1880). Marxism is analysis of the development of the world as it is, a method that must forge an intimate connection between practice and theory.        

hope this helps

Answer 2

here are the basic principles of mrxism:-
opposition to an economic system based on inequality and on the alienation and exploitation of the majority (by means of the system of wage labor) system whosr purpose is to obtain profits for some people rather than satisfying the needs to all.