Well seeing as how India and Brazil would be on the side of NATO youre looking at only Russia and China vs the World.....I'd pick the world.
The US alone could solo the rest of the world.
At the moment, N.A.T.O. In 30 years? Harder to say.
You have a 28 member group vs a 6 member group.
Well since most people who comment here do not have that much exprince let me be the voice of reason I am a lecturer at University of Cape Town and can I say I live in SA a brics country and the likely hood of a war is small and South Africa tries to be so neutral that we don't buy weapons from Russians and Americans we buy from The Seedes and Germans so SA being in war is slim and Brics needs NATO for trade and NATO needs Brics for raw materials a war between these two would ruin all their economies as it would be a war versus Technology (NATO) and manpower(25% of world population live in Bricks) so most likely a new world order would arise
You all are fucking idiots, BRICS would win. NATO stands zero chance.