# unilineal evolution

> English word · Noun

## Definitions
1. The theory, now considered obsolete, that societies evolve in a single direction toward complexity, progress, and civilization.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/unilineal-evolution