Military about to drug soldiers with male bonding hormone?

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Prior research has shown that oxytocin, also known as the "love hormone," contributes to protectionist behavior, especially in mammalian mothers.

De Dreu and colleagues wanted to explore whether the hormone might also play a role in making men more aggressive toward outsiders.

De Dreu calls the pairing of in-group solidarity and out-group aggression "parochial altruism," or the "tend and defend" response.

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