Unilineal evolution

Unilineal evolution (also referred to as classical social evolution) is a 19th-century social theory about the evolution of societies and cultures. It was composed of many competing theories by various anthropologists and sociologists, who believed that Western culture is the contemporary pinnacle of social evolution. Different social status is aligned in a single line that moves from most primitive to most civilized. This theory is now generally considered obsolete in academic circles.

Theories of social and cultural evolution are common in modern European thought. Prior to the 18th century, Europeans predominantly believed that societies on Earth were in a state of decline. European society held up the world of antiquity as a standard to aspire to, and ancient Greece and ancient Rome produced levels of technical accomplishment which Europeans of the Middle Ages sought to emulate. At the same time, Christianity taught that people lived in a debased world fundamentally inferior to the Garden of Eden and Heaven. During the Age of Enlightenment, however, European self-confidence grew and the notion of progress became increasingly popular. It was during this period that what would later become known as 'sociological and cultural evolution' would have its roots.

The Enlightenment thinkers often speculated that societies progressed through stages of increasing development and looked for the logic, order and the set of scientific truths that determined the course of human history. Georg Wilhelm Friedrich Hegel, for example, argued that social development was an inevitable and determined process, similar to an acorn which has no choice but to become an oak tree. Likewise, it was assumed that societies start out primitive, perhaps in a Hobbesian state of nature, and naturally progress toward something resembling industrial Europe.

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