something. Throughout this book I’ve argued that large-scale human societies are nearly miraculous achievements. I’ve tried to show how our complicated moral psychology coevolved with our religions and our other cultural inventions (such as tribes and agriculture) to get us where we are today. I have argued that we are products of multilevel selection, including group selection, and that our “parochial altruism” is part of what makes us such great team players. We need groups, we love groups, and we develop our virtues in groups, even though those groups necessarily exclude nonmembers. If you
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