Facebook’s algorithms shaping the news. Self-driving cars roaming the streets. Revolution on Twitter and romance on Tinder. We live in a world constructed of code–and coders are the ones who built it for us. Programmers shape our everyday behavior: When they make something easy to do, we do more of it. When they make it hard or impossible, we do less of it. From acclaimed tech writer Clive Thompson comes a brilliant anthropological reckoning with the most powerful tribe in the world today, computer programmers, in a book that interrogates who they are, how they think, what qualifies as greatness in their world, and what should give us pause.

In pop culture and media, the people who create the code that rules our world are regularly portrayed in hackneyed, simplified terms, as ciphers in hoodies. Thompson goes far deeper, taking us close to some of the great programmers of our time, including the creators of Facebook’s News Feed, Instagram, Google’s cutting-edge AI, and more. Speaking to everyone from revered 10X elites to neophytes, back-end engineers and front-end designers, Thompson explores the distinctive psychology of this vocation–which combines a love of logic, an obsession with efficiency, the joy of puzzle-solving, and a superhuman tolerance for mind-bending frustration.

Along the way, Coders ponders the morality and politics of code, including its implications for civic life and the economy and the major controversies of our era. In accessible, erudite prose, Thompson unpacks the surprising history of the field, beginning with the first coders – brilliant and pioneering women, who, despite crafting some of the earliest personal computers and programming languages, were later written out of history. At the same time, the book deftly illustrates how programming has become a marvelous new art form–a source of delight and creativity, not merely danger. To get as close to his subject as possible, Thompson picks up the thread of his own long-abandoned coding skills as he reckons, in his signature, highly personal style, with what superb programming looks like.

To understand the world today, we need to understand code and its consequences. With Coders, Thompson gives a definitive look into the heart of the machine.