| Smile! You've Got Low Testosterone!
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| "Getting to like You, Getting to Hope You like Me"
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| Two Kinds of People, Two Ways to Live
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| When Your Level Is Too Low
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| Related Hormones
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| Altruism and Mixed Motives
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Chapter 8. Heroic Altruism
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| A Walk on the Crust of Hell
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| Local Heroes
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| Varieties of Heroic Altruism
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| The Altruism Tax
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| The Mixed Values of Love and War
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| Values Supporting Heroic Altruism
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| Positive Reinforcement
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