That do you think? - In international relations/ morality has no purchase

I tend to agree with this statement, what do you think? Please comment, it helps broaden my own views on International Relations.

“In international relations, where power is unequally distributed, morality has no purchase. States pursue their own national interests and the strong rule wherever they can. This is not a doctrine that Might is Right. It is rather the view that Right is irrelevant. Might just is what everywhere prevails.”

	David Fisher, 2011 : Morality and War: Can War Be Just in the Twenty-First Century?