Take ancestral environment into account. Asia and Africa have torrid summers, but Europe -- at least Western Europe -- mostly doesn't; this is especially true o

Take ancestral environment into account. Asia and Africa have torrid summers, but Europe -- at least Western Europe -- mostly doesn't; this is especially true of the British Isles, a temperate-rainforest zone comparable to the West Coast or parts of inner Appalachia. For US residents with mostly British (including Irish) ancestry, air conditioning is a return to ancestral environments, not a departure from them.