“A full spectrum of products exploit the disruptions of modern life to help us cope with this stress, to make us temporarily less unhappy—and to hook us with a promised return to some imagined state of bliss. The physical environment drives us, through anxiety and opportunity, to the kinds of behaviors that generate more inflammation: overeating, drug use, and self-isolation.118 Chronic stress makes the body vulnerable to addiction,119 increasing levels of emotional stress cause decreased impulse control,120 and the more chronic the stress becomes, the more maladaptive the behavior becomes.121 Chronic stress dampens activity in the prefrontal cortex—the part of the brain responsible for rational decision making and self-control—and heightens activity in the limbic system, which includes the amygdala, an ancient center of the brain that guides impulsive behavior.122 Global industries intuitively understand this connection between the endocrine and nervous systems, encouraging addiction and overconsumption as a path to happiness, a dynamic that David Courtwright calls “limbic capitalism.”123 As Facebook cofounder Sean Parker explained, social media are engineered to hijack our need for social connection, offering “a little dopamine hit” to the reward centers of the brain through likes and retweets and views.124 This is not exactly an accurate description of the complex neurobiology at play, but it is a fair assessment of how Facebook keeps us coming back for more.125”