This document summarizes Amartya Sen's book "Development as Freedom". Sen argues that development should be viewed as expanding people's freedoms and that freedom is both the primary goal and means of development. He defines freedom in terms of having access to things like food, healthcare, education, employment, and political rights. Sen advocates for measuring development by people's capabilities and opportunities rather than just economic metrics like GNP. He believes markets and social institutions can enhance individual freedoms that are important for development.