The major goal of this book was to develop and examine a novel theoretical framework for understanding the early and later development of Far Right parties in Western Europe. Using and extending the insights of the voluminous literature on this topic, this book focused on how party and media behavior affect the initial and subsequent trajectories of Far Right parties. It has shown that in earlier stages of party development, the fortunes of these parties largely depend on exogenous factors: on the availability of political opportunities and communication resources. This book has also suggested that after their initial breakthroughs, these parties increasingly rely on endogenous factors, such as their organizational capacity and their positioning in the competitive space. The study examined party and media behavior in the “most similar” cases of Austria and Germany and in the “most different” case of Greece. It showed that despite marked differences between the Greek and the other two country cases, the trajectory of the Far Right was shaped by similar processes. Moreover, this book suggested the generalizability of these findings by examining the trajectory of the French National Front. More research and further analysis would be needed to show whether the findings are valid for more country cases beyond the four considered here. While this book does not claim generalizability beyond the cases it closely analyzed, it has sought to devise useful conceptual and analytical tools for studying this phenomenon in other empirical settings.