I have the most up to date ATI drivers and it's not working.
Edit: So it turns out that Steam's driver updater doesn't actually know what the most up to date drivers are, and a quick visit to the AMD website got my video drivers up to date and Civ 5 working again
Edit: So it turns out that Steam's driver updater doesn't actually know what the most up to date drivers are, and a quick visit to the AMD website got my video drivers up to date and Civ 5 working again