“A fascinating book.”
—James Ryerson, New York Times Book Review

A Smithsonian Best Science Book of the Year
Winner of the PROSE Award for Best Book in Language & Linguistics

Carved into our past and woven into our present, numbers shape our perceptions of the world far more than we think. In this sweeping account of how the invention of numbers sparked a revolution in human thought and culture, Caleb Everett draws on new discoveries in psychology, anthropology, and linguistics to reveal the many things made possible by numbers, from the concept of time to writing, agriculture, and commerce.

Numbers are a tool, like the wheel, developed and refined over millennia. They allow us to grasp quantities precisely, but recent research confirms that they are not innate—and without numbers, we could not fully grasp quantities greater than three. Everett considers the number systems that have developed in different societies as he shares insights from his fascinating work with indigenous Amazonians.

“This is bold, heady stuff… The breadth of research Everett covers is impressive, and allows him to develop a narrative that is both global and compelling… Numbers is eye-opening, even eye-popping.”
—New Scientist

“A powerful and convincing case for Everett’s main thesis: that numbers are neither natural nor innate to humans.”
—Wall Street Journal

"A fascinating book." - New York Times Book Review

"Fascinating…This is bold, heady stuff…The breadth of research Everett covers is impressive, and allows him to develop a narrative that is both global and compelling. He is as much at home describing the niceties of experimental work in cognitive science as he is discussing arcane tribal rituals and the technical details of grammar…It is often poignant, and makes a virtue of the author’s experiences with some of the indigenous peoples he describes, based on a childhood following his missionary parents—in particular his famous father, Daniel Everett—into the Amazon jungle…Numbers is eye-opening, even eye-popping. And it makes a powerful case for language, as a cultural invention, being central to the making of us." - New Scientist

"Everett buttresses his argument with an impressive array of studies from different fields…It all adds up to a powerful and convincing case for Everett’s main thesis: that numbers are neither natural nor innate to humans but ‘a creation of the human mind, a cognitive invention that has altered forever how we see and distinguish quantities.’ His argument that numbers played a crucial role in the development of agriculture and the complex societies it supported is equally persuasive." - Wall Street Journal

"In this multi-disciplinary investigation, anthropologist Caleb Everett examines the seemingly limitless possibilities and innovations made possible by the evolution of number systems." - Smithsonian