In Marxism, it is said that the proletariat brings about social change.

He is deeply immersed in the study of Marxism.

We need a change in the education system.

His irresponsible behavior caused an accident.

This company is promoting the revolution of technology.

He has risen in social standing.

We should take responsibility as part of society.

It is generally believed that the life of the middle class is stable.

He emphasized the importance of class struggle.

I am very interested in social science.