The short answer is war is lawful only in self-defense from armed attack by another nation’s government, and lawful response is to arrest US/UK/Israel leaderships for unlawful Wars of Aggression.
Background history: It’s easy to document the US as a neocolonial empire; offspring of Europe’s lust for material wealth that spawned two world wars in the century within which all current adults were born.
All of our families sacrificed through those wars. Please take a moment to feel what they went through. Please take a moment to experience the cumulative costs inflicted by “developed” nations’ imperialism and wars, including Israel’s escalating unlawful War of Aggression on Palestine that make Gaza the world’s largest concentration camp.
The two world wars begat two treaties to end nations’ armed attacks. They are crystal-clear in content and context: the Kellogg-Briand Pact (General treaty for renunciation of war as an instrument of national policy as official title), and the United Nations Charter.
Article Six of the US Constitution defines a treaty as US “supreme Law of the Land;” meaning that US policy may only complement an active treaty, and never violate it.
This is important because all of us with Oaths to the US Constitution are sworn to honorably refuse all unlawful war orders; military officers are also sworn to arrest those who issue them. Indeed, we suffer criminal dishonor if we obey orders for armed attack when they are not “self-defense” as clearly limited by treaty from dear experience of our families’ engagement in world war.
Treaty 1. Kellogg-Briand: General treaty for renunciation of war as an instrument of national policy:
The legal term renounce means to surrender access; that is, to remove that which is renounced as lawful option. This active treaty (page 466 “Renunciation of War”), usually referenced as the Kellogg-Briand Pact, states:
The High Contracting Parties solemly declare in the names of their respective peoples that they condemn recourse to war for the solution of international controversies, and renounce it, as an instrument of national policy in their relations with one another.
The High Contracting Parties agree that the settlement or solution of all disputes or conflicts of whatever nature or of whatever origin they may be, which may arise among them, shall never be sought except by pacific means.”
Treaty 2. United Nations Charter:
As I’ve written for years to point-out arguably the world’s most important single law:
The UN Charter is a Treaty in Force; an active US treaty. Article VI of the US Constitution declares treaties as having equal power with Constitutional law and laws from Congress. This is also known as the Supremacy Clause:
“This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the contrary notwithstanding.”
Therefore what the US president and 2/3 of the Senate have agreed to in a treaty is the law of the US until such time as the US rescinds that treaty obligation. The UN Charter is therefore the law of the US with its clear restrictions of using war as a foreign policy option.
It’s also helpful to understand what the UN is not. The only area of legal authority of the UN is security/use of force; all other areas are advise for individual nation’s legislature’s consideration. The UN is not global government. It is a global agreement to end wars of choice outside of a very narrow legal definition of national self-defense against another nation’s armed attack.
The preamble of the United Nations includes to “save succeeding generations from the scourge of war… to establish conditions under which justice and respect for the obligations arising from treaties and other sources of international law can be maintained, and… to ensure, by the acceptance of principles and the institution of methods, that armed force shall not be used…”
The UN purpose includes: “To maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace…”
3. All Members shall settle their international disputes by peaceful means in such a manner that international peace and security, and justice, are not endangered.
4. All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations.
5. All Members shall give the United Nations every assistance in any action it takes in accordance with the present Charter…
Article 24: In order to ensure prompt and effective action by the United Nations, its Members confer on the Security Council primary responsibility for the maintenance of international peace and security, and agree that in carrying out its duties under this responsibility the Security Council acts on their behalf.
Article 25: The Members of the United Nations agree to accept and carry out the decisions of the Security Council in accordance with the present Charter.