Why, despite the refusal of the overwhelming number of states to use the right of war, wars continue in the modern world?

If we generalize all wars in the history of mankind, then we can conditionally say that their cause is in the contradictions between states, tribes, peoples, state formations or political blocs. Between states and between people, a war begins at the moment when one state “interferes” with the realization of the goals of another or falls into the sphere of its interests. War for resources.