Toby Ord is today's Carl Sagan. Clear and inspiring, this book leaves us hopeful for a flourishing human future

Christine Peterson, co-founder of the Foresight Institute

A powerfully argued book that alerts us to what is perhaps the most important – and yet also most neglected – problem we will ever face

Peter Singer, author of 'Animal Liberation' and 'The Life You Can Save'

The Precipice separates science from hype and will remain the definitive work on existential risk for a long time to come

Max Tegmark, author of 'Life 3.0' and 'Our Mathematical Universe'

A fascinating and persuasive guide to the most important topic of all: how our species will survive the risks we pose to our continued existence

Stuart Russell, author of 'Human Compatible' and 'Artificial Intelligence: A Modern Approach'

This book is a wake-up call to the existential threats of nuclear and biological weapons and the urgent need for action. A must-read that galvanises us to play a role in addressing these risks

Angela Kane, former UN High Representative for Disarmament Affairs

Humanity has never been more vulnerable – there's now a one-in-six chance that civilisation won't make it to the end of the century, argues a highly influential philosopher . . . Ord's analysis of the science is exemplary . . . Thrillingly written

Sunday Times