Modern society is plagued by health epidemics: obesity, record levels of loneliness, increasing mental health problems and various forms of addiction. From the outside, all these issues might not seem related. But a single phenomenon actually ties them all together: superstimuli. Superstimuli are behaviours, objects and social cues that are exaggerated, unnatural versions of things we have evolved to want and need. This hard-wired evolutionary response is why we lust after airbrushed people online, binge on fake ultra processed food and struggle to stop scrolling on social media, even when...