Conventional leadership has failed in its responsibility to mitigate the adverse environmental impact of corporations and organizations. This chapter discusses the evolution of a post-conventional models of leadership, specifically climate change leadership, that are designed to transform the purpose of business into a sustainable and regenerative planetary enterprise that benefits all stakeholders, including the biosphere. The psychological determinants of climate change leadership are reviewed with a particular focus on the pro-environmental aspects of behavior, cognition, and emotion. The chapter also discusses some of the barriers to the implementation of climate change leadership including the tensions and polarities that are impeding progress. Some suggestions for the management of these polarities are discussed before the chapter concludes with a review of the research and challenges of developing climate change leaders for the age of sustainability.