This Ice Age will be a breeze. Buildings in the ice sheet, small nuclear reactors for heat and electricity....
Farming rows of ice plants, picking bouquets of frozen flowers, eating your neighbor.
If you can grow weed under LEDs, you can grow veggies. Besides, the sun will still shine. Garden near the surface or the ice sheet. Sure, some folks will live( or not) in deprived areas, but I can see it being the most survivable Ice Age, evah. For good or ill...previous Ice Ages wiped out the wimps.