In this article Richard Barbieri asserts that the biggest danger to our own safety and well-being, and that of our children, comes not from adult predators, environmental hazards, or the class bully, but from traits common to us all. The enemy is us, and not least because we too often jump to such strategies as clobbering. Writers from such varied fields of expertise as business ethics, behavioral economics, and neuroscience seem to come up every day with further evidence that our own thinking does us in more often than an external enemy ever could. Herein, Barbieri reviews four key publications that support this theory: (1) "Thinking, Fast and Slow," Daniel Kahneman (Farrar, Straus and Giroux); (2) "The Invisible Gorilla: How Our Intuitions Deceive Us," Christopher Chabris and Daniel Simons (Crown Publishing); (3) "Strangers to Ourselves: Discovering the Adaptive Unconscious," Timothy D. Wilson (Harvard University Press); and (4) "On Being Certain: Believing You Are Right Even When You're Not," Robert A. Burton (St. Martin's Griffin).