Paul J. Zak, author of The Moral Molecule: The Source of Love and Prosperity, asks “Could a single molecule—one chemical substance—lie at the very center of our moral lives?” in the Wall Street Journal:
Research that I have done over the past decade suggests that a chemical messenger called oxytocin accounts for why some people give freely of themselves and others are coldhearted louts, why some people cheat and steal and others you can trust with your life, why some husbands are more faithful than others, and why women tend to be nicer and more generous than men. In our blood and in the brain, oxytocin appears to be the chemical elixir that creates bonds of trust not just in our intimate relationships but also in our business dealings, in politics and in society at large.
Known primarily as a female reproductive hormone, oxytocin controls contractions during labor, which is where many women encounter it as Pitocin, the synthetic version that doctors inject in expectant mothers to induce delivery. Oxytocin is also responsible for the calm, focused attention that mothers lavish on their babies while breast-feeding. And it is abundant, too, on wedding nights (we hope) because it helps to create the warm glow that both women and men feel during sex, a massage or even a hug.
Since 2001, my colleagues and I have conducted a number of experiments showing that when someone’s level of oxytocin goes up, he or she responds more generously and caringly, even with complete strangers. As a benchmark for measuring behavior, we relied on the willingness of our subjects to share real money with others in real time. To measure the increase in oxytocin, we took their blood and analyzed it. Money comes in conveniently measurable units, which meant that we were able to quantify the increase in generosity by the amount someone was willing to share. We were then able to correlate these numbers with the increase in oxytocin found in the blood…
[continues in the Wall Street Journal]
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