Leftist ideology may be gaining ground in Latin America. But it will never set foot on the manicured lawns of Francisco Marroquin University. For nearly 40 years, this private college has been a citadel of laissez-faire economics. Here, banners quoting "The Wealth of Nations" author Adam Smith -- he of the powdered wig and invisible hand -- flutter over the campus food court. Every undergraduate, regardless of major, must study market economics and the philosophy of individual rights embraced by the U.S. founding fathers, including "life, liberty and the pursuit of happiness." A sculpture commemorating Ayn Rand's "Atlas Shrugged" is...