Alfred North Whitehead summed it up best when he remarked that the greatest invention of the nineteenth century was the idea of invention itself. We had learned how to invent things, and the question of why we invent things receded in importance. The idea that if something could be done it should be done was born in the nineteenth century. And along with it, there developed a profound belief in all the principles through which invention succeeds: objectivity, efficiency, expertise, standardization, measurement, and progress. It also came to be believed that the engine of technological progress worked most efficiently when people are conceived of not as children of God or even as citizens but as consumers--that is to say, as markets.