If an evil super-genius plotted to breed a race of obese, feeble, heart-diseased diabetics, he could hardly do better than to re-create the consumer paradise of twenty-first-century America. From cradle to grave we pass our days largely immobile, gazing at screens and wiggling our fingertips. To fuel this inactivity we devour copious quantities highly processed food, maintaining our metabolisms on ceaseless alert. Our environments are so sanitized of dreaded biological pathogens that our understimulated immune systems attack our own bodies; while in car and home we knowingly inhale a miasma of certified carcinogens against which we have no defense. We bomb the rare infection with such antibiotic force that our indigenous micro-biomes are catastrophically reconfigured, setting off a cascade of ailments only beginning to be understood by science…