http://online.wsj.com/article/SB10001424052702304811304577365782995320366.html?mod=WSJ_hp_mostpop_read
Could a single molecule -- one chemical substance -- lie at the very center of our moral lives?
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.
