"The field of Archaeoastronomy and Stonehenge disagrees:"
Not really. It was astrology. Just as science arose out of philosophy, so astronomy arose out of astrology. I don't know what stonehenge was used for, but I'm pretty sure if it is a lunar calendar, or a solstice calculator or some such, the druids (or whoever it was who put it there), did not do it for a love of science, they wanted to figure out what their gods were telling them