This book spells out what we need to do to solve the global problems that threaten our future: the climate crisis; the current pandemic; the destruction of the natural world, catastrophic loss of wild life, and mass extinction of species; lethal modern war; the spread of modern armaments; the menace of nuclear weapons; pollution of earth, sea and air; rapid rise in the human population; increasing antibiotic resistance; the degradation of democratic politics, brought about in part by the internet. I argue that all these problems have come about because we have solved the first of two great problems of learning – the problem of learning to acquire scientific knowledge and technological know-how – but have so far failed to solve the second g...