The world is returning to the 1970s on most economic policies, so why not antitrust too? Judging by events this week, antitrust enforcement in the U.S. and Europe is in for a major comeback, whether or not consumers benefit. Yesterday in Brussels, the European Commission imposed a record antitrust fine of $1.45 billion on Intel for the heinous crime of discounting computer chips in its fierce and long-running competition with AMD. Meanwhile on Monday, President Obama's new antitrust chief, Christine Varney, issued a radical revision of the Department of Justice's own antitrust enforcement standards. Ms. Varney's ambition seems to be...