How did Enlightenment ideas about progress shape cultural evolution theories?

Enlightenment ideas about progress were foundational to early theories of cultural evolution, establishing a framework that viewed human history as a continuous, upward trajectory toward perfection, reason, and civilization.1234

The Enlightenment Foundation

Enlightenment thinkers, such as the Marquis de Condorcet, posited that human history was governed by natural laws, much like the physical universe. This perspective suggested that society was not static or divinely ordained but was a self-made, evolving entity. Philosophers argued that humanity progressed through distinct stages, driven by the application of reason and the advancement of knowledge.1256

Impact on Cultural Evolution Theories

This belief in inevitable progress directly shaped 19th-century social science in several ways:

• Unilinear Evolution: Early anthropologists, including E.B. Tylor and Lewis H. Morgan, adopted the Enlightenment view to create "unilinear" models. They categorized all human societies into a single, universal sequence—often moving from "savagery" through "barbarism" to "civilization"—with Western industrial society positioned as the pinnacle of achievement.146
• Technological Determinism: Enlightenment optimism regarding human mastery over nature led theorists to equate technological innovation with moral and social advancement.67
• Rationality as a Metric: The Enlightenment emphasis on reason led to the assumption that as societies became more "rational," they would naturally shed earlier forms of belief, such as magic or superstition, in favor of science.6

While these grand, deterministic theories of unilinear progress were eventually rejected for their Western-centric bias and lack of empirical support, the Enlightenment's core idea—that human history is a cumulative, patterned process—remains a significant, albeit refined, influence in modern social science.147