Remember, for any policy or vital decision; there is always a think tank behind it that controls the policies and decisions taken by the government. However, it varies from country to country. This can consist of anyone—either the political party member, technocrats, or any particular member performing such acts. However, for the dominant countries, their motherland makes such policies. So to end the war, you need to talk to such authorities. However, it would be difficult for anyone to follow the supreme leader of any country to gain information.