Great article: concise and to the point. The old Greeks were often first to scribble down a lot of notions, early on. No doubt the same ideas might have surfaced elsewhere too and no doubt we'll hear about those discoveries here on HN.
For the layman such as myself, who might like to get some sort of idea what the old Greek civilization might have been like I do recommend "Courtesans and Fishcakes: The Consuming Passions of Classical Athens" SBN 0006863434. Also dive into any modern translation of Herodotus - well worth a read.
Britons might like to investigate: "The Extraordinary Voyage of Pytheas the Greek" SBN: 0140297847. Pytheas describes the Pretanike. Change the P for a B and allow that -ike is an old Greek ending and you can see where Britain comes from. It seems to translate to something like "painted/tattooed peoples". The old Britons - iron age - might have displayed woad tattoos. However, this: https://www.tastesofhistory.co.uk/post/dispelling-some-myths... seems pretty well informed. I do find myself agreeing that William Wallace was probably not an Australian! I can also confirm that running up his memorial tower, near Stirling is rather easier when you are 11 than when you are 53. Lovely view though.
Was hal.