1. Our feelings weren’t designed to depict reality accurately even in our “natural” environment. Feelings were designed to get the genes of our hunter-gatherer ancestors into the next generation. If that meant deluding our ancestors—making them so fearful that they “see” a snake that isn’t actually there, say—so be it. This class of illusions, “natural” illusions, helps explain a lot of distortions in our apprehension of the world, especially the social world: warped ideas about ourselves, about our friends, our kin, our enemies, our casual acquaintances, and even strangers. (Which about
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