League of Nations

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For example, what could lead to lasting peace between states? In his 1795 essay, "On Perpetual Peace," Kant recommended a "league of nations" as a federal community of republican states. According to Kant, political action must always be guided by the law of morality. His work became the blueprint for the founding of the League of Nations after World War I (1914-1918), the forerunner of the United Nations, in whose charter it left his mark.

In addition to international law, Kant also developed a world citizenship law. In doing so, he rejects colonialism and imperialism and formulates ideas for the humane treatment of refugees. According to the philosopher, every person has a right of visitation in every country, but not necessarily a right of hospitality.

Kant believed that life could be mastered with reason and arguments, and formulated a basic rule for this — "Act in such a way that the maxim of your will could at any time be regarded as the principle of general legislation." He called this the "categorical imperative." Today we would formulate it like this: You should only do what is the best for all.

https://www.dw.com/en/why-immanuel-kants-philosophy-is-still-relevant-amid-todays-wars/a-68847759

Except that is not what he is saying. He says act as if you were setting the standard and the norm, not "do what is best for all."