Isaac Asimov's Caliban (Isaac Asimov's Caliban, #1)

The First Law: a robot may not injure a human being, or through inaction, allow a human being to come to harm...

When an experiment with a new type of mechanical brain goes awry, Caliban is created - a robot with no knowledge of humanity ... a robot without the Three Laws. Unleashed upon the far-future, Caliban is alternately labelled a killer, an aberration, a martyr, a pioneer. A fugitive in a cruel world, he is hunted by people on both sides of the law. And as he follows his own survival instincts, his fate is to alter the destiny of all humanity...