Centuries ago, the principle of Ockham’s razor changed our world by showing simpler answers to be preferable and more often true. In Life Is Simple, scientist Johnjoe McFadden traces centuries of discoveries, taking us from a geocentric cosmos to quantum mechanics and DNA, arguing that simplicity has revealed profound answers to the greatest mysteries. In McFadden’s view, life could only have emerged by embracing maximal simplicity, making the fundamental law of the universe a cosmic form of natural selection that favors survival of the simplest. Shermer and McFadden discuss: from what was science set free?; what William of Occam’s razor cut; Bayes’s probability razor; Ptolemaic vs. Tychonic vs. Copernican world systems in terms of simplicity; simplicity in math, physics, biology, medicine, and the social sciences; Einstein’s razor: how does relativity theory simplify the universe?; Postmodernism and the search for Truth; McFadden’s explanations for solving the hard problems of consciousness, free will, and determinism, and more …