Book excerpt: This introduction to the main heterodox schools of economic thought examines their main concepts and their critiques of mainstream theory. The schools examined include Austrian economics, geo-economics, the Virginia school of political economy, feminist economics, humanist economics, institutional economics, and nondeterminist Marxism. The aim of these essays is to understand the ideas and methodology of these approaches, and also to explain why there are different approaches to economics, and how the various schools relate to each other.