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

As long as experiencing your optimal level of good stress doesn't damage others, it's hard to objectively define where normal enjoyment of stimulation becomes adrenaline junkiehood.

Stress is not a state of mind... it's measurable and dangerous, and humans can't seem to find their off-switch.

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.

What happened in the milliseconds before a behavior to cause it? That's in the neurobiological realm.

The frontal cortex is an incredibly interesting part of the brain - ours is proportionately bigger and/or more complex than in any other species.

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