Objectivism. It isn't perfect though. Nothing's ever perfect, is it? Her characters are interesting. Her protagonists are motivated by achievement. Her antagonists are motivated by power and profit. It is ironic that Hank Rearden and Dagny Taggart are called greedy and selfish, while James Taggart and his bureaucratic cronies twist laws to rob business. The government essentially becomes a system of forcing the hard workers, the greatest producers, to work "for the good of society". Laws are passed to freeze the economy. The scary thing is the realism - how soon can we expect this kind of choking governmental control in America?
P.S. If you enjoyed Atlas Shrugged, there is an annual essay contest by the Ayn Rand Institute for 12th graders, undergraduate, and graduate students. The book is available here