This book warns of the imminent extinction of our species through human-caused disasters. Contrasting with commonly held views, we highlight the indifference of ordinary people to future generations as the most serious disaster. To save our Planet will require a great many people to be motivated to feel and bond with future people as our neighbours. To achieve that, vivid imagination of future people as living beings is essential. We suggest ways to change ordinary, inward-looking people, to become altruistic, caring for future people so everyone can become dedicated to future generations. Scientists and politicians might then follow warm-hearted ordinary people.