1) America-the world's lone superpower and the global "police".
2)Russia-though russia is just re-building due to it's swith to capitalism, its technology is some of the best in the world as is it's military
3)china-the world's largest military and a giant economical force
4)India- india is the most populous democracy on earth. it's population would completely overpower some of the smaller, more advanced nations.
5)UK-a major diplomatic power in the world and it's close relationship with the USA gives the UK this title
6)Japan- Japan's defensive force is probably the best in the world, aside from israels and its economy gives it immense control over itself and also gives this country the ability to form a very formidable military machine.
7) Israel-the best defensive force in the world and a close relationship with the USA
8)France-France, in my opinion, is a highly overrated nation on the world scale but it still deserves a spot in the top ten.
The 9 and ten spots are difficult to assign but i would say these spots are between: Germany, Pakistan, Korea South, or egypt