Parts 1 & 2 of the Evolving series explored our everyday use of the words evolve and evolution.
We¹ have rather strange ways of talking about how biological evolution works. When we talk about life-forms evolving, we imbue a random, undirected, aimless process (Darwin's 'descent with modification') with agency, intention and purpose (
part 1). We tell stories of change, and of life progressing and improving.
When we tell 'evolution stories' (with agents and purpose), we add moral judgements about improvement. We meld the two contradictory dictionary meanings of evolution into a hybrid² concept of 'descent with modification (technical meaning) toward improvement and a better state (non-technical meaning)'. This sits behind many moral judgements about the 'value' of various life forms, particularly about non-human animals, e.g. saying that humans are the pinnacle of evolution (part 2).
Our 'stories' of evolution work more like metaphor - a simplifying shortcut - than being an accurate description.
This story of 'evolving' and improving is now the dominant way that we understand the world - not limited to explaining biodiversity (as Darwin intended his theory). We refer to societies, cultures, ideas, businesses, technology, musicians, language (and more) as evolving.
And that leads to some very dangerous ideas.