That is the subtitle of Dan Stastny's very insightful book, The Economics of Economics (Wolters Kluwer, 2010).
In discussing our program at GMU to would-be graduate students or potential donors and other interested parties I often stress that economists have a professional obligation to communicate their research findings and the knowledge of the discipline to four distinct audiences: scientific peers, students, policy makers, and the general public. The true master economist, such as Milton Friedman, can communicate effectively to all four levels. But not everyone is so talented as Milton Friedman.
At GMU, however, we do provide opportunities for graduate students to learn and develop their communication skills so they can pursue their comparative advantage at any 1 or more of these levels. The most successful of these students can and do master more than 1 level. Even though priority is given to the ability to communicate with one's scientific peers, we recognize that value in pursuing one's comparative advantage and in mastering the art of economic communication (in spoken and written word) more generally. This is what makes our department unique more than anything else, we respect as a group all four communicative activities of the economist. We also see a strong connection between all four communicative acts --- understanding the science improves our ability to talk to students, policy makers and the public. In short, economics from our perspective is not just a game to be played by clever people, it is a discipline of immense importance for our understanding of, and the potential for improvement in, the human condition.
Dan concludes this wonderful book by informing his readers that for economics to be respected and to have its teachings heeded, "it may not only needs its Samuelsons, Friedmans or Hayeks, but also its Cobdens, Brights, and Bastiats. When economists figure this out, there will be a better chance that they may at last become as important as garbagemen, at least in the eyes of those who consider handling of ideas as momentous as handling of garbage."