You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who is called the advocate of conflict theory?" whose answer is Karl Marx.
Each document should contain about 30 words, and these documents should contain useful information.

Query: advocate of conflict theory
Useful Output:

Doc 1: Conflict theory is one theory that is widely used to explain various phenomena of social change that occur in society. In its dynamics, various
Doc 2: Conflict theory orients activists toward fighting oppression, but other theoretical approaches could help societies to achieve other possible
Doc 3: German philosopher Karl Marx is considered the father of this theory, but others have expanded on it. We'll discuss what conflict theory is in
Doc 4: German economist and sociologist Max Weber (1864 -1920) agreed with Karl Marx that conflicts in society existed because of competition over
Doc 5: Conflict theory encompasses several theories that share underlying assumptions about interlocking systems of oppression and how they are