water,
I recognize my own desire to be at peace in my family, community, and the world. There is no authority that can grant that to me. All of my social behavior stems from this.
I have described to you and given you guidance on researching the natural evolution of morality and ethics. We all have it naturally to a greater or lesser degree. There is zero need for morality or ethics to be imposed from outside (i.e. god).
You may have the preconception that man is inherently evil. You, of course, get this from holy books. You think we need a divine edict regarding this. You are wrong.
Man is inherently good. No group could survive long enough to evolve intellect at all if not for a natural tendency for good. You must cooperate, help each other, protect each other, and care for each other, to survive. Those that don't, in general, fail to pass their genes to the future, unless you are a solitary hunter/carnivore.
Of course there is a normal distribution of moral and ethical traits. If you don't know what that means, research some statistics. So there will always be the average peaceful, cooperative core, and then the more aggressive leaders, the shy and timid, and a smattering of the violent and the complete recluses.