You cannot solve the world’s greatest problems without a certain level of delusion and naïveté that enables you to keep going when others see the thing as impossible. It also helps to surround yourself with other bold visionaries rather than naysayers. While most people assume the greatest problems have already been solved and the biggest breakthroughs are behind us, others step forward and end slavery, cure disease, invent the car, reach the moon, and leave the world better than they found it. There is no shortage of problems still worth solving, but will you be one of the fantastic few willing to give your life to one?