Thou shalt not kill.
Thou shalt love thy neighbour as thyself.
One of the most useful aspects of the ten commandments for moral relativists is the number of things they do not prohibit. They do not, for example, prohibit the marketting of toxic drugs, profiteering from firearms sales to third world countries or landmines. The generic proposition that Jesus postulated to replace the old Judaic law " do unto others as you would have them do unto you." sorts all this out. From Johnston to the most recent Bush, American Presidents have provided the rest of the world leadership in doing to others whatever is necessary to ensure they don't do it to you.