Habits of a Happy Brain: Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin, & Endorphin Levels

by Loretta Graziano Breuning

Modern society is not the cause of vicious cycles. Our ancestors had variations of their own. For example, they made human sacrifices to relieve threatened feelings, and when they felt bad again, they made more sacrifices.