Which of the following statements best describes Karl Mannheim's contributions to sociology?
1
He founded the structural-functionalism theory, emphasizing the stability of social structures.
2
He developed the concept of the "iron cage" to describe the increased rationalization in modern society.
3
He is known for his work in the "sociology of knowledge," particularly his theory on the influence of ideology and utopia on thought.
4
He introduced the term "social fact" to describe elements of societal life that shape individual behavior.