“Once upon a time there lived a man called Thales. He was a bit of a scientist, and greatly impressed the people of his day by applying his new ideas in real life. This enabled him to achieve some notorious instances of military success and economic advantage. But what he became most famous for was the idea that the world stays where it is because it is floating on water, and – on the same theme – the idea that all the things in the world derive from water in some way. No sooner had Thales (who lived in a place called Miletus, right by the sea) put forward this wet hypothesis than others felt the need to take up the challenge: “not water”, said one, “but air”; “not air”, said another, “but earth”; “not any of those”, said a third, “but some other stuff that isn’t really anything in particular”. Everyone wanted to explain, as he thought best, how the world, as we know it now, could have originated from some single undifferentiated matter. This debate went on for some time, each contributor adding a plausible theory to explain how the world might have come to look as it now does, supposing his own idea of its origin were true.”
(p.29)
This is very simply written and accessible, so it works for a ‘very short introduction’. It can be quite dry but the varied format (pictures, text boxes, tables etc.) help make it a little more engaging – perhaps for entry-level information Wikipedia is useful for basic reviews too, but books like this are more trustworthy for all the obvious reasons. Some of the introductory material seemed a bit obvious (explanations about what a fragment is etc.), but as a classicist things that seem obvious to me may not be to other people, and I’m sure the author just wants to make sure everyone is on the same page. I found there was good checking of our priorities (i.e. debate) where these assumptions might be anachronistic, and yet there is some evidence for the recognition of reasoned argument in the early stages, though Osborne points out that the natural philosophers didn’t do much to defend their own views.
All in all, this is a pretty typical addition to the ‘very short introduction’ series: if you want to learn about a new subject, they will give you the basic insight, but in their strictly factual and objective format they are unlikely to instil much passion or enthusiasm in the process.