This chapter contains four parts. To some, questions of time and politics may appear extraneous – they may be valid issues to study but not a central concern for contemporary IR, much less a necessary one. For them, it is just another area of study and deciding whether to pursue it is a matter of personal choice. The first section shows how international politics and time are already intertwined and argues that time impacts the main issues of concern for IR. The second shows how IR is “stuck in the past” – even as it furiously gestures toward the future – because it theorizes temporality and time as universal and linear, privileging the past, all while resisting thinking about the present. The third section briefly introduces what I call presentism, an alternative temporal imaginary for IR that explicitly values the present, thinks in time, and resists naturalizing the contemporary political dominance of universal, linear time. The final section outlines the rest of the book, identifying theoretical and conceptual implications, concretizing both by showing how it enables a different perspective on war, American foreign policy during the Trump administration, and IR’s primary theoretical architectures.