Naukratis and Pelusium, major emporiums of the delta of Egypt during the iron age, were reduced to insignificance by the time of Alexander the Great, because they were on two of the distributaries of the Nile (the Canopic and Pelusiac respectively) which became desert. That would be called climate change, ostensibly caused by humans (the climate change alarmists would have to say), but of course bows and arrows, slings and rocks, would not cause “greenhouse gasses,” for it was the Nile sourced thousands of miles to the south in the mountains of east-central Africa which waned slowly, for a thousand years, after the Ice Age had ended, its end during which Moses led the Israelites to the Promised Land.