Who we all used to be: The origins of humans and the control of nature -- Why we sometimes need worms and whether or not you should rewild your gut: When good bodies go bad (and why) -- The pronghorn principle and what our guts flee -- The dirty realities of what to do when you are sick and missing your worms -- What your appendix does and how it has changed: Several things the gut knows and the brain ignores -- I need my appendix (and so do my bacteria) -- How we tried to tame cows (and crops) but instead they tamed us, and why it made some of us fat: When cows and grass domesticated humans -- So who cares if your ancestors sucked milk from aurochsen? -- How predators left us scared, pathos-ridden and covered in goose bumps: We were hunted, which is why all of us are afraid some of the time and some of us are afraid all of the time -- From flight to fight -- Vermeij's law of evolutionary consequences and how snakes made the world -- Choosing who lives -- The pathogens that left us hairless and xenophobic: How lice and ticks (and their pathogens) made us naked and gave us skin cancer -- How the pathogens that made us naked also made us xenophobic, collectivist, and disgusted -- The future of human nature: The reluctant revolutionary of hope.