The four happy hormones (Dopamine, Oxytocin, Serotonin, and Endorphins) are out here tricking us into staying alive.
Sources:
Leaders Eat Last by Simon Sinek.
"The Animal Origins of Dopamine, Serotonin, Oxytocin, and Endorphin and Implications for Human Wellbeing", International Journal of Psychiatry by Dr. Loretta Graziano Breuning.
"D.O.S.E.: The brain's happy chemicals, explained" from khironclinics.com
"Essential Guide to Serotonin and The Other Happy Hormones in Your Body" from atlasbiomed.com