"The changes in the nature of Chinese government after 1978 where at least as great as those that took place in economic policy. Indeed, one could argue that the massive shift from a centrally planned economy to a more open and marketized one could not have occurred without corresponding changes in the nature of government." -- Fukuyama, p. 371
"One could argue"? Well, is one arguing? And who would that "one" be?
Why not just write, "I argue that"?