Spencer was interested in evolution, so he said, “Sociology is the study of evolution in its most complex form.” Sociology is, in other words, “the natural history of societies” or, more precisely, “an order among the structural and functional changes that societies undergo.”
Spencer’s sociology was not limited to historical civilizations. Instead, he agreed to explore the many ways modern organizations and institutions are tied to other occurrences of their different eras. It encompasses the relationships between political institutions, social disparities, family arrangements, methods of distribution, and degrees of interaction between places, knowledge levels, religious beliefs, morality, feelings, customs, and ideas.
Spencer’s sociology is primarily concerned with macro-level social phenomena such as social aggregates as societies, social structures, and social institutions, as well as the purposes of each.