[pipio21]

"I think Iraq, Egypt, Iran and India were all as hot as they are now."

Not really, we are talking 3000 to 4000 years ago and certainly climate was colder then.

When we talk about Egypt we know there were very fertile land and cities then that are desert now. In Mesopotamia there were terrible deforestation done by humans that is recorded on documents and salinization of fertile lands that are now also desert but at the time supported millions of people.

We also know there has been at least two terrible changes in climate that lasted at least years that made the Earth cold and dark linked to volcanic eruptions.