We may claim that the world has developed a lot. But still might is right.
Can anyone stop China from oppressing Tibetans? The answer is simple no.
Similarly, could anyone do anything to USA, when it attacked Iraq, without UN sanction (who is USA to decide, whom to attack, without UN sanction?) in the name of WMD, which did not exist there?
Similarly could anyone do anything to Israel, when it flouted many of UN resolutions? No bcoz it is blindly supported by USA.
Could anyone do anything, when USA, the world's biggest producer of green house gases, refused to sign the Kyoto protocol, being the only developed country not to have signed it?
All talk of liberty, democracy, human rights etc is just for speaches.