"In 1943, three books appeared that transformed American politics: Isabel Paterson's The God of the Machine, Rose Wilder Lane's The Discovery of Freedom, and Ayn Rand's The Fountainhead. Together, they laid the groundwork for what became the modern libertarian movement. Even more striking were the women behind these books: Paterson, a brilliant but misanthropic journalist whose weekly column made her one of the nation's most important literary critics;...