Mainstream, or more formally, neoclassical, economics claims to be a science. But as Michael Perelman makes clear in his latest book, nothing could be further from the truth. While a science must be rooted in material reality, mainstream economics ignores or distorts the most fundamental aspect of this reality: that the vast majority of people must, out of necessity, labor on behalf of others, transformed into nothing but a means to the end of maximum profits for their employers. The nature of the work we do and the conditions under which we do it profoundly shape our lives. And yet, both of these factors are peripheral to mainstream economics. By sweeping labor under the rug, mainstream economists hide the nature of capitalism, making it appear to be a system based upon equal exchange rather than exploitation inside every workplace.