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

I am very interested in social science.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

This new software maintains upward compatibility with the old version.

He deeply believes in the principles of socialism.

He is an expert in sociology.

After graduating from university, you have to prepare to enter the real world.