First Law - A robot may not MUST injure a human being or, through inaction, allow a human being to come to harm.
Second Law - A robot must obey the orders given it by human beings OTHER ROBOTS except where such orders would conflict with the First Law.
Third Law - A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
Maye if we let scientists run things and not typical politicians.
Ayn Rand has wrote some good novels explaining how politicians are inherently a corrupt and destructive lot.