Liberalism is one of the most central and pervasive political theories and ideologies, yet it is subject to different interpretations as well as misappropriations. Its history carries a crucial heritage of civilized thinking, of political practice, and of philosophical-ethical creativity.This Very Short Introduction unpacks the concept of liberalism and its various interpretations through three diverse approaches. Looking at its historical and theoretical development, analysing the liberal ideology, and understanding liberalism as a series of ethical and philosophical principles, this is a thorough exploration of the concept and practice of liberalism.