““Mammals live in herds and packs and troops because there’s safety in numbers. A mammal doesn’t consciously decide whether to stick with the herd or strike out on his own when he wakes up each morning.Instead, his brain produces a good feeling near the group, and a bad feeling when separated. Cortisol surges when a herd animal can’t see at least one of his group, and oxytocin surges when he’s reunited with””
