We're well past the end of the ice age;
We're in an interglacial period, the true "Ice Sheet' called the Laurentide that was over New England etc.. at one point is gone... ~6k yrs ago.
the ice retreating today is from increased melting and is limited to Alpine glaciers, as well as the polar caps.
Actually the climate infront of the retreating Laurentide sheet was quite unusual, with probably no modern analog.. fiercely cold winters and pretty warm summers (lots of melting)
guess that you paid attention in geology class
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