/ɪˈvɒlv/
[verb] To develop or change slowly over time into something different, often better or more complex. It can describe living things, ideas, systems, or situations that gradually transform.
Before Darwin made it famous, 'evolve' simply meant to unroll a scroll — nothing to do with biology at all.
The word 'evolve' begins its life in Latin, where the verb evolvere was built from two parts: the prefix ex-, meaning 'out of' or 'away from', and volvere, meaning 'to roll'. Put together, evolvere meant something wonderfully physical and concrete — to roll something outward, to unroll a scroll, or to unfold a book. In the ancient world, where texts were written on long rolls of parchment rather than bound pages, this was a very practical image. You would literally evolve a document by unrolling it to read it.
The Latin root volvere is itself extremely old and productive, and it gave English a remarkable family of words. Directly from Latin volvere came volvulus (a twisted intestine) and volute (a spiral architectural form). Through the Latin volumen, meaning a roll of writing, came the English word 'volume'. Through Latin revolvere came 'revolve', and through Latin involvere came 'involve'. Each of these words carries, somewhere inside it, the ancient idea of rolling or turning.
English adopted 'evolve' in the early 17th century, and at first it kept closely to the Latin sense. Writers used it to mean unrolling or opening something out — a concept that was metaphorical but still tied to the idea of physical unfolding. Philosophers and scientists of the 17th and 18th centuries began using it to describe the unfolding of events or ideas over time, as if history or thought were a scroll being gradually rolled open. This was still a far cry from anything biological.
The word's meaning shifted significantly in the 18th century, when it entered the language of natural philosophy. Scientists began using 'evolution' — the noun form — to describe the way an embryo unfolds and develops from a simple form into a complex organism. This was known as the 'preformationist' theory, which imagined that tiny, perfectly formed creatures were already present inside seeds or eggs, simply waiting to unroll and expand. It is a strange and now-discredited idea, but it gave the word its first biological home.
Then came Charles Darwin. When he published 'On the Origin of Species' in 1859, he was actually cautious about the word 'evolution' — it does not appear in the first edition at all. He preferred 'descent with modification'. It was his readers and supporters, particularly the scientist Herbert Spencer, who pushed the word into its modern biological meaning: the gradual process by which species change across generations through natural selection. By the late 19th century, 'evolve' had been completely transformed. A word that once meant unrolling a piece of parchment had become one of the most powerful and contested words in all of science.
Today, 'evolve' is used far beyond biology. We speak of cities, technologies, languages, relationships, and musical styles that evolve. Every time we use the word, we are — without knowing it — invoking that ancient Roman librarian unrolling a scroll, slowly revealing what was always there, waiting to be read.