This chapter briefly overviews the intellectual map and evolution of peacebuilding in theory and practice. As an associative concept, peacebuilding has become an important policy and academic field due to its appealing normative nature, broad definitional flexibility and elasticity, and capacity to entangle with other concepts and practices. The first part of the chapter explores how the concept of peacebuilding has changed over time, moving from an academic discipline to a tool for implementing policy and back again. The chapter then looks at new directions that aim to decentre and pluralize the field's direction and the change from the liberal, hybrid, and local turns in peacebuilding studies. It also looks at how security, development, transitional justice, women, youth, and the environment are related to peacebuilding.