Humans developed agriculture shortly after the last ice age ended.
I don’t understand why the timing works out that way. The places where farming first started hadn’t been under the glaicers. The local climates of Egypt, Iraq, and Central America were probably a lot more pleasant when the weather was cooler.
Homo sapiens has roamed the earth for some 30,000 years. The glaciers retreated about 12,000 years ago. So why didn’t someone in the Fertile Crescent start planting grain 18,000 years sooner?