Abstract
This chapter argues that reflexivity - an introspective process in which researchers turn their engagement into an object of research - is essential to sustainability transitions research (STR). Reflexivity in STR encompasses not only the non-neutrality of its normative categories, such as ‘sustainability’ and ‘radical’, but also its descriptive categories, including ‘regime’ and ‘system’. This inherent social embeddedness, or ‘engagedness’, positions transition researchers with both an inescapable responsibility and a unique opportunity to shape their engagement reflexively. Reflexivity, which is relevant at every stage of STR, is illustrated in terms of research orientation, role and positionality. It highlights that much of reflexivity lies in the question of how - and with what kind of awareness - you are personally doing what you are doing. As a transition researcher, you are in a comparatively powerful societal position. Your choices matter and make a difference in the world.