The three laws were only ever literary: Asimov was exploring the consequences in a story universe of imposing laws invented by the bigoted John Campbell. The f

The three laws were only ever literary: Asimov was exploring the consequences in a story universe of imposing laws invented by the bigoted John Campbell. The final outcome was humans confined to Earth (for their own safety: space travel is dangerous) and all other (potentially) spacefaring life exterminated. There is a crossover scenario where Saberhagen's Berserkers are Asimovian robots and their humans are distinct from Saberhagen's.