You don’t, and because of that the UN is losing its relevance. It was never perfect, but it’s increasingly sidelined by major powers that will just do whatever they want. The Palestinian genocide shows us that it is unable to stop a genocide, the war in Ukraine and previously the war in Iraq show that it can’t stop powers from just invading whomever. Even as a forum it is losing relevance, with smaller groups like the G7 and BRICS, or regional blocs like the EU and ASEAN becoming the source of new international policy.