 Professor Hannes H. Gissurarson asserts that Piketty is replacing American philosopher John Rawls as the essential thinker of the left.In addition to questioning common measures of wealth distribution, he also criticizes Piketty for being, unlike Rawls, "much more concerned with the rich than with the poor".Hannes admits that the "rapid rise in the income of the super-rich of the world" is happening, but doesn't view this trend as being a problem so long as the poor do not get poorer.