It's clear you haven't read any Asimov stories. His robots are impeccably ethical due to the three laws, and the stories explore robopsychologicalb conundrums that arise when people keep putting them in situations that tax the three laws of robotics.
In most of Asimov's stories it's implied that machines have quietly and invisibly replaced all human government and the world is better for it because humans tend to be petty and cruel while it's impossible for robots to harm humans.
