First tier: Russia, USA, China -- they can't be conquered by anyone. Sheer size.
Second tier: other countries with nukes. Mutually assured destruction. Nuff said.
Third tier: Other Western Europe w/o nukes, Japan, S Korea, Australia, Saudi Arabia, Iran, Brazil -- at extremely high cost of attacker can be fought by first/second tier.
Everyone else is probable still conquerable.
We should be happy we have nukes nowadays. More peace.
Second tier: other countries with nukes. Mutually assured destruction. Nuff said.
Third tier: Other Western Europe w/o nukes, Japan, S Korea, Australia, Saudi Arabia, Iran, Brazil -- at extremely high cost of attacker can be fought by first/second tier.
Everyone else is probable still conquerable.
We should be happy we have nukes nowadays. More peace.