But it’s not only serotonin that makes up the foundation of those collaborative experiences. In those states, all of the neurochemicals18 that can arise—serotonin, dopamine, norepinephrine, endorphins, anandamide, and oxytocin—play roles in social bonding. Norepinephrine and dopamine typically underpin “romantic love,” endorphins and oxytocin link mother to child and friend to friend, anandamide and serotonin deepen feelings of trust, openness, and intimacy. When combinations of these chemicals flow through groups at once, you get tighter bonds and heightened cooperation.
