"largely discredited" depends which variant you mean: the utopian claim that countries with 'free markets' never fight each other which is clearly untrue, or th

"largely discredited" depends which variant you mean: the utopian claim that countries with 'free markets' never fight each other which is clearly untrue, or the claim that openness to trade reduced the likelihood of conflict between countries which appears to be largely correct and along with its close cousin the "democratic peace hypothesis" has plenty of intellectual support from the tacit to the write bestselling books with bombastic titles (certainly it has substantially more support than the once-fashionable alternative: Lenin's "imperialism" in which capitalist countries become more aggressive than their mercantilist forebears in their attempts to capture increasing wealth on the battlefield rather than more preoccupied by maintaining trade).