49:13 The Chambers: O mankind! Indeed, We created you from a male and a female, and made you nations and tribes that you may identify yourselves with one another. Indeed the noblest of you in the sight of Allah is the most Godwary among you. Indeed Allah is all-knowing, all-aware.
Chapter 49 in Qur'an is called The Chambers. That is likely related to self-control and control (edit: Defensively), where you abide by borders as Royalty does, the borders of your chamber. With respect to hirearchy, in Karate and TKD also, all martial arts; to chamber is to load your kick or punch. Maybe someone wants to elaborate.
But I want to talk about identity and knowing your borders and limits, in Qur'an. God says; "...and made you nations and tribes that you may identify yourselves with one another."
So we should identify ourself in meeting eachother. As historically people of different schools of martial arts (edit: In Japan etc.) were afraid to meet and fight other schools, they might've won and they might lose also. Nothing ventured nothing gained. Not guts no glory. However i would like to state there are rules as Halal and Haram for me as Muslim. Other people have other Rules. If your rules say you should kill (unrightfully) and steal, that is bad rules, Muslim Jewish or Christian or Buddist, anything. Or Karate.