Basic Principle of Marxist Theory:
Marxism is a socio-economic theory developed by Karl Marx and Friedrich Engels. The basic principle of Marxist theory is the belief that all of human history is marked by class struggle.

Key Points:
- Materialism: Marxism is rooted in materialism, which means that the material conditions of society, such as the means of production and distribution, shape human behavior and social relations.
- Class Struggle: Marxists believe that society is divided into two main classes - the bourgeoisie (the ruling class who own the means of production) and the proletariat (the working class who sell their labor for wages). This class struggle is the driving force behind historical change.
- Historical Materialism: Marxists use historical materialism to analyze how economic systems develop and change over time, leading to the rise and fall of different social structures.
- Capitalism: Marxists critique capitalism as a system that exploits the working class for the benefit of the ruling class. They argue that capitalism leads to inequality, alienation, and crises.
- Revolution: Marxists believe that the proletariat will eventually rise up against the bourgeoisie in a socialist revolution, leading to the establishment of a classless society where the means of production are collectively owned.
In conclusion, the basic principle of Marxist theory is centered around the idea of class struggle and the belief that historical change is driven by the conflict between different social classes.