I guess its more idealist theory.According to Mills, “what
social science is about is the human variety, which consists of all
the social worlds in which men have lived, are living and might
live” and the broadest aim of the social scientist “is to
understand each of the varieties of social structure, in its
components and in its totality.”
If we accept Mills’ conception, the diverse social structures
need not have any bonds uniting them other than the fact that men
have created them and lived in them at various times and places.
They lack any essential material unity or historical continuity and
simply stand out as different social units.
Mills believed that the sociological imagination would relieve
the tension from people’s lives as they learned that they were not
alone in their troubles, and that it would also cause individuals
to take more action in influencing public policy.