No robot built, of any type, could possibly hurt a human being. That was the First Law of Robotics: "A robot may not injure a human being, or, throug… - Isaac Asimov

An insolubility is not a problem.

The fall of Trantor," said Seldon, "cannot be stopped by any conceivable effort. It can be hastened easily, however. The tale of my interrupted trial will spread through the Galaxy. Frustration of my plans to lighten the disaster will convince people that the future holds no promise to them. Already they recall the lives of their grandfathers with envy. They will see that political revolutions and trade stagnations will increase. The feeling will pervade the Galaxy that only what a man can grasp for himself at that moment will be of any account. Ambitious men will not wait and unscrupulous men will not hang back. By their every action they will hasten the decay of the worlds.

In the first place, we started in the early days of science fiction — not only the Big Three, but others of importance such as Lester del Rey, Poul Anderson, Fred Pohl, Clifford Simak, Ray Bradbury, and even some who died young: Stanley Weinbaum, Henry Kuttner, and Cyril Kornbluth, for instance. In those early days, the magazines paid only one cent a word or less, and there were only magazines. There were no hardcover science fiction publishers, no paperbacks, no Hollywood to speak of.