That we adopt a system of non-interference with other human beings. In other words-do what you want, just do not interfere with another person.

Examples; slander someone -interference "201", assault someone -interference "98" - first degree murder interference "1".

Some criteria need to be established, for example in the case of abortion it would have to be established by common consensus when a fetus is considered a human being!

This would also make suicide leagal as long as you don't hit someone on the sidewalk under the building you jumped from (interference!)