International Relations was always meant to have impact. That is, research under that umbrella was intended to make a difference in the world. ‘International Relations’ is the most common and possibly most problematic of these various terms, however. This catholic version of international relations can often be better designated with lower case, to distinguish it from the version that is largely the focus of university departments teaching and researching the discipline titled International Relations, with capitals to designate its status as a noun. This chapter evaluates impact in international affairs, in the round, in an attempt to understand the seemingly weaker-than-could-be-expected performance of politics and international studies in the formal UK septennial research accountability and evaluation exercise, in 2014. That version, while not excluding breadth, became largely focused on theory and a concomitant tussle between different ideological views, in essence, of politics and the international world. The chapter also presents an overview of the key concepts discussed in this book.