Immanuel Wallerstein in the context of "World-system"

Sociocultural evolution, sociocultural evolutionism or social evolution are theories of sociobiology and cultural evolution that describe how societies and culture change over time. Whereas sociocultural development traces processes that tend to increase the complexity of a society or culture, sociocultural evolution also considers process that can lead to decreases in complexity (degeneration) or that can produce variation or proliferation without any seemingly significant changes in complexity (cladogenesis). Sociocultural evolution is "the process by which structural reorganization is affected through time, eventually producing a form or structure that is qualitatively different from the ancestral form".

Most of the 19th-century and some 20th-century approaches to socioculture aimed to provide models for the evolution of humankind as a whole, arguing that different societies have reached different stages of social development. The most comprehensive attempt to develop a general theory of social evolution centering on the development of sociocultural systems, the work of Talcott Parsons (1902–1979), operated on a scale which included a theory of world history. Another attempt, on a less systematic scale, originated from the 1970s with the world-systems approach of Immanuel Wallerstein (1930–2019) and his followers.

A sociological theory is a supposition that intends to consider, analyze, and/or explain objects of social reality from a sociological perspective, drawing connections between individual concepts in order to organize and substantiate sociological knowledge. Hence, such knowledge is composed of complex theoretical frameworks and methodology. These theories range in scope, from concise, yet thorough, descriptions of a single social process to broad, inconclusive paradigms for analysis and interpretation. Some sociological theories are designed to explain specific aspects of the social world and allow for predictions about future events, while others serve as broad theoretical frameworks that guide further sociological analysis. Dynamic social theory is the hypothesis that institutions and patterns of behaviour are the social science equivalent of theories in the natural sciences because they embody a great deal of knowledge of how society works and act as social models that are replicated or adapted to achieve predictable outsomes.

Prominent sociological theorists include Talcott Parsons, Robert K. Merton, Randall Collins, James Samuel Coleman, Peter Blau, Niklas Luhmann, Immanuel Wallerstein, George Homans, Theda Skocpol, Gerhard Lenski, Pierre van den Berghe and Jonathan H. Turner.