You presumably don't know that the HCO period of warming correlates with the periodic changes in axial tilt. The Northern Hemisphere warmed as you state, and the Southern Hemisphere cooled.
It wasn't a global warming, but an increase in solar to the North. Globally temperatures were probably similar to today. Any runaway effects in the North and Arctic would have been compensated by increased glaciation in the South.
That's why Antarctic cores go back further - it didn't melt like the Arctic did.
No, I do know that, and it is completely irrelevant. It doesn't matter why the artic was seven degrees warmer, all that matters is that it was seven degrees warmer.
2000 years ago the world population was maybe 20mil. Saying the earth being a few degrees warmer now wont make a difference is stupid statement. As billions will die from droughts famine and the wars that will be the result of it. We humans are warming the earth you don't want to do anything about it or don't care about it is one thing. Saying it won't effect the world as the temperature was warmer 2000 years ago is a stupid statement.
