Time travel is a terrifying weapon, far more powerful than anything ever before conceived,' he said grimly.'Mankind just isn't ready for that kind of knowledge. We're like children casually playing with an atom bomb.
It was my responsibility that this world got itself an atom bomb, because there were only a handful of nuclear physicists in the thirties - only a handful. And we were all beating the desk and saying "How wonderful it will be if we discover atomic fission.
Welcome baby it's your turn to live they're laying for you chicken pox whooping cough smallpox malaria TB heart disease cancer and so on unemployment hunger and so on train wrecks bus accidents plane crashes on-the-job injuries earthquakes floods droughts and so on heartbreak alcoholism and so on nightsticks prisons doors and so on they're laying for you the atom bomb and so on welcome baby it's your turn to live they're laying for you socialism communism and so on.
Radio - and perhaps airplanes, and then of course, the atom bomb - was the preeminent technology of the first half of the 20th century. It was how the Third Reich controlled its citizens, spread lies, and disseminated fear.
It is only when science asks why, instead of simply describing how, that it becomes more than technology. When it asks why, it discovers Relativity. When it only shows how, it invents the atom bomb, and then puts its hands over its eye and says, My God what have I done?