Neuroeconomist (yes, that’s a field of study) Paul Zak has been getting a lot of attention recently for his just-released TED talk, titled “Trust, morality, and oxytocin.” While you can watch the 16-minute lecture here, CNN has now published a short article by Zak that might be easier for you to digest. Here’s the intro: The longest debate since humans have been having debates is whether we are good or evil. It underlies the stories of Adam and Eve, Cain and Abel, Jesus and Judas. What is our human nature? Of course, the answer is we can be both good and evil. But what determines which part of our character emerges? About a decade ago, my lab made an unexpected breakthrough in the understanding…