[Tell It Right]

This begins what's known as the Dark Age cooling period. If you define the Dark Age as the fall of the western Roman empire, the begin date is around AD 376. If by "Dark Age" you're talking about the cooling period that followed the Roman Warm Period, the begin date is closer to AD 300 -- when average temps topped out and started gradually declining. Some say it was closer to AD 270, some say more like AD 300.

That's when crop yields started going down, rain patterns were harder to predict, and plagues went up. Don't let the warmageddonists fool you. Life during the cooling periods suck. Life during the warming periods are great times to be alive (at least as far as climate science goes). However much longer the Modern Warm Period lasts, we should be glad we live in it.

[entropy12]

Next ice age will kill 1000 times more humans than anything global warming can. Ice age repeats 15000 to 30000 year intervals. If humans can postpone next ice age arrival by just 100 years, think of all the lives saved.

[BroJoeK]

"However much longer the Modern Warm Period lasts, we should be glad we live in it."

My thoughts exactly.