More than anyone else, John von Neumann created the future. He was an unparalleled genius, one of the greatest mathematicians of the 20th century, and he helped invent the world as we now know it. He came up with a blueprint of the modern computer and sparked the beginnings of artificial intelligence. He worked on the atom bomb and led the team that produced the first computerised weather forecast. In the mid-1950s, he proposed the idea that the Earth was warming as a consequence of humans burning coal and oil, and warned that ‘extensive human intervention’ could wreak havoc with the world’s climate. Colleagues who knew both von Neumann and his colleague Albert Einstein said that von Neumann had by far the sharper mind, and yet it’s astonishing, and sad, how few people have heard of him.