Is WW3 even possible without USA involvement?

.

World War is generally going to be between the two following Super powers. Who eventually fights on which side is up for debate

TEAM A- RUssia/China/Arab Alliance
vs
TEAM B - Europe/USA/Nato Alliance.



If we look at Syria, it could be said it is basically a proxy War over ensuring key strategic territory.
Team A - (mostly Russia), see current interventions by Team B there as a direct threat. They have even said so just a few days ago.


The Syrian crisis does have the potential to grow and grow, and if WW3 is coming in the next decade or so, I think history will see Syria as the start of it.


BUT- if the USA changed direction, like imagine if Trump is not full of shit, gets in and ACTUALLY implements a policy of non intervention in foreign affairs- HOW COULD WW3 possibly begin.


Without the US backing them - Europe and Nato would never be stupid enough to take on Russia, or provoke it via proxy wars near its borders.

Without US involvement WW3 would likely never start in the first place.

IN short - I am saying - maybe Trump is our only hope.