America can only stop the war of Ukraine and Russia if they follow it dialogue. But were by america supporting Russian or neither Ukraine by giving each of the country war supplements. With this method i fish out that it means the war can never come to end. I think world peace keeping ambassador is still existing.so with this sector or set of government function can call the problem of Ukraine and Russia to bar. And it can only happens if peace making ambassador is mandated to do so with other top countries support
I think America can and it should do all what it can to stop this war which is not only causing huge human casualties, collateral damage but all economic crisis worldwide. Look at crude oil prices, inflation and food price where they were before the war and where they are today. America will have to sit with Russian leadership to negotiate the future of Ukraine which is acceptable for all parties involved and this is the only way to bring this conflict to an end.