Humanity needs to understand the universal ethic that endows us with liberty and natural human rights. Its two basic principles are that it is morally wrong to invade and coercively harm others, and that to do moral good is to provide wanted benefits to others. Human equality is a premise of the universal ethic, which endows each person with the morally proper ownership of his own life, time, and body. Our labor and fruits of labor are morally the property of the producer. But no human being created land, so equality implies an equal benefit from land, achievable by all sharing the economic rent from land.
War is usually a conflict for land and the persons in the land.
A world at peace would let each individual person live as he chooses so long as he did not coercively harm others, harm being an invasion rather than a mere offense. The economic market rent from natural resources, including land as nature made it, would be shared globally. Grabbing territory would have little payoff if the land holder has to compensate all the rest of humanity for excluding it from that territory. There is massive ignorance about the universal ethic and the economics of land rent. Yet suppose humanity did recognize the u.e.