To out-group-members, oxytocin makes you crappier - less cooperative and more preemptively aggressive. It's not the luv hormone. It's the in-group parochialism/xenophobia hormone.

We are just another primate but a very confused, malleable one.

Genes are rarely about inevitability, especially when it comes to humans, the brain, or behavior. They're about vulnerability, propensities, tendencies.

...when doing science (or perhaps when doing anything at all in a society as judgmental as our own), be very careful and very certain before pronouncing something to be a norm - because at that instant, you have made it supremely difficult to ever again look objectively at an exception to that supposed norm.

We live well enough to have the luxury to get ourselves sick with purely social, psychological stress.

Oxytocin is a Teflon hormone - bad news rolls off it.

If you care about your longevity and health, be a socially affiliated baboon who is better than high-ranking ones at walking away from provocations.