LOL - WTF....
Which continent do you think would win in global war of unarmed combat (hand to hand fighting only)? Let's say Russia and the Middle East is part of Europe for this. North and South America count as 1 continent and Oceania can go with Asia. Asia obviously has the most people but they are physically smaller. I think maybe Africa would win.
Europe (but only if counting Russia) - strength in numbers
otherwise North America (USA, Canada)
superior technology, transport, communications, logistics... etc... even though conventional weapons are out being able to locate the enemy, co-ordinate & supply your own forces etc.. would prove to be significant.
Africa - no chance... African leaders can barely run their own countries let alone co-ordinate a global war....