to save succeeding generations from the scourge of war, which twice in our lifetime has brought untold sorrow to mankind, and
to reaffirm faith in fundamental human rights, in the dignity and worth of the human person, in the equal rights of men and women and of nations large and small, and
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 promote social progress and better standards of life in larger freedom,
AND FOR THESE ENDS
to practice tolerance and live together in peace with one another as good neighbours, and
to unite our strength to maintain international peace and security, and to ensure, by the acceptance of principles and the institution of methods, that armed force shall not be used, save in the common interest, and
to employ international machinery for the promotion of the economic and social advancement of all peoples,
Defeat, because Russia does everything in their power... to undermine all this. And everywhere they go. Not because we don't like them or because of what they perhaps see as 'incidents'.
Link: https://www.un.org/en/about-us/un-charter/full-text
Article 4: Membership in the United Nations is open to all other peace-loving states which accept the obligations contained in the present Charter and, in the judgment of the Organization, are able and willing to carry out these obligations.