If it wasn't for America. China would within hours attack Taiwan who is a former state of china, then Japan, and probably Sounth and possibly even North Korea would.
Russia would imminently invade Georgia and then take back the rest of the former Soviet Union states one by one.
Pakistan/Afghanistan and India would attack each other, likely a full blown nuclear war.
The Middle East would be one huge civil war and Iran/Syria would probably attack Israel.
Further down the line Russia would probably try to acquire Scandinavia, as they have done before with Finland.
Great Britan, France, Germany would probably vote against getting involved.
Brazil and Mexico would probably keep some order in South America but there would be domestic chaos.
Winers would be: Canada, Africa and Island. Possibly Germany, Great Britain and France, depends on what Russia does.