No country is so obsessed with the idea that monopoly is evil as the United States. The response of other industrializing societies to the development of economic hegemonies has been to regulate them, not to break them up. And no other major country has anything resembling the corpus of antitrust law that has built up here since the first statute, the Sherman Antitrust Act, was passed by Congress in 1890. The American economy has changed almost beyond recognition over the course of the twentieth century as the industrial empires of Andrew Carnegie and John D. Rockefeller turned into the electronic empires of Andrew Grove and Larry Ellison. But antitrust law has hardly changed at all.