Paul Krugman, 2008 winner of the Nobel Prize in economics, is a very smart guy, and an ardent apologist for the liberal views of economic policies.. His book The Accidental Theorist and Other Dispatches from the Dismal Science is a collection of some of his best articles in the New York Times and elsewhere. I have to say that I often don't agree with his views, but that is all the more reason to try to understand them, and to understand the underlying assumptions that drive his views.
His views are important (a) because he represents the liberal position on many economic issues, and makes good cases for them and (b) because he may well be right and I may be wrong, and one needs to constantly question and challenge one's views if one is more interested in gaining understanding and approaching truth than in just being comfortable.