Explanation:

- Max Weber (option 4): In "Economy and Society," Weber discussed social stratification. He proposed a multi-dimensional approach, including class, status, and power, recognizing that social hierarchy consists of more than just economic factors.

- Karl Marx (option 1): Marx's main focus was on class conflict, particularly between the bourgeoisie and the proletariat. He viewed economic relationships as the foundation of social structures.

- R. Dahrendorf (option 2): Focused on the conflict theory like Marx, but highlighted the role of authority beyond just economic factors, adding further dimensions to class discussions.

- C.W. Mills (option 3): Known for his work on the power elite and how institutional power shapes societal structures.