The same governments we are asking to create a ban on killer robots will secretly develop them in spite of any ban. The military seldom worries about mere laws. All they have to do is claim that their efforts are for national security or world peace, and the people will acquiesce. That’s how we got the present killer-drone program. Since laws will never stop tyrants from developing more efficient weapons, our only hope is to create a political system that prevents tyrants from coming to power.