We are ancient bodies in a modern world, and things are not quite right.

While life has certainly become more comfortable and less arduous, we have grown fatter, more depressed, and increasingly dependent on medication.

Processed foods make us sick; thermally neutral environments make us fragile; a digital world leaves us physically disconnected—clearly, something is amiss in modern life.

This book offers scientifically backed exercises and advice—covering diet, sleep, exercise, and bathing—to help us maintain our mental and physical health and thrive in the modern world.