This chapter introduces a 14 chapter book on interstate rivalry typologies and selected rivalry dynamics. Emphasis is placed on positional and spatial rivalry types (as opposed to ideological and interventionary rivalries) but some attention is also given to principal rivalries. Following a relatively quick review of the evolution of explicit rivalry analysis in international politics, the contents of 13 following chapters are outlined. Five pertain to updating the strategic rivalry dataset to 2020 and a consideration of some of the issues revolving around spatial and positional rivalries. Another seven chapters focus on selected rivalry dynamics, ranging from geohistorical contexts to rivalry termination. The last chapter sums up the findings. Throughout the emphasis is placed on not treating all rivalries as if they are alike. They may share similarities but it is worthwhile to distinguish among the various types.The analysis of interstate rivalries is still a relatively new approach to studying conflict in world politics. The basic idea is that a disproportionate amount of interstate conflict is traceable to a very small number of state pairs that engage in recidivistic hostilities. Why should we waste time looking at pairs of states that never come into conflict? 1 Why not focus more on the recidivists? Yet we will argue later that all recidivists are not the same. So, even that starting point can be treacherous. But before we get to some of the complications, it would be best to provide an overview to the rivalry landscape. Seven analytical categories are reviewed. It is argued that we have good foundations in terms of rivalry origins, maintenance/escalation and termination/deescalation. We can certainly improve on the foundations be we also need to expand our understanding of rivalry types, "complexities," rivalry effects, and domestic rivalries. 1 The social science answer, of course, is that we need variance to make any explanatory headway. We are not challenging this basic truth. What we are challenging is the idea that we should begin our analyses with the assumption that all dyads are equally conflict-prone.Parts of this chapter are a modified version of William R. Thompson's earlier chapter, "Trends in the Analysis of Interstate Rivalries," originally published in Robert Scott and Stephen Kosslyn (Eds.) Emerging Trends in the Social and Behavioral Sciences (Wiley, Hoboken, 2015).