Ayn Rand's moral philosophy sets forth a new understanding of the essence of evil, a view that is different from the common cultural understanding. What, according to Ayn Rand, is the root of evil, and how can goodness best be guarded from this threat? Under what circumstances, and by what method, is it necessary to study evil in order to defeat it? Her original insights are profoundly practical--for anyone who wishes to fight evil and be free from it.