Liberalism has been the leading political theory of the past three hundred years and, by far, the most dominant ideology. Many think tanks are associated with liberal ideas, and most Western countries are considered liberal democracies. But does liberalism really cover the wide range of political ideas found in Western civilization? Degrees of Freedom examines liberalism's universal claims and explains how liberal thinkers formulated insights that apply to all aspects of politics. It also contrasts liberalism and conservatism.

Edwin van de Haar divides liberalism into three...