ABSTRACTDipesh Chakrabarty's The Climate of History in a Planetary Age is, in three respects, far more than a synthesis of over a decade of pioneering conceptual work aimed at making sense of the Anthropocene/planetary predicament and its implications for historical understanding. First, the book makes visible an intellectual trajectory in which Chakrabarty's conceptual struggles with the Anthropocene gradually move from the centrality of the notion of the Anthropocene toward the centrality of the notion of the planet. Second, it highlights the relational complexities with which one needs to grapple when trying to make sense of the current predicament. Third, and finally, the book showcases a series of often overlapping conceptual distinctions that Chakrabarty has developed while navigating these complexities. Through a discussion of the above key aspects, this review essay highlights the achievements of The Climate of History in a Planetary Age and critically engages with its central themes. In dialogue with the book, it pays special attention to exploring the respective benefits and drawbacks of the notions of the Anthropocene and the planet, and to the character and role of human agency in the Anthropocene/planetary predicament. Finally, the essay concludes with a few thoughts concerning the question of what kind of a reinvention of historical understanding might be triggered, respectively, by the notions of the Anthropocene and the planet.