There are the strong and the weak in this world.
Even when only two people are gathered, this very ranking is formed, tipically these are the criteria for forming the ranking:
First: age. This hasn`t been effective for quite a long time now.
Second: fist. Still works, but if you don’t do it rigth you’ ll get it back a houndred times over. Third: power of speech. Low cost and highly efficent. It definetly works well.