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Caroline A. Hartzell

Civil wars typically have been terminated by a variety of means, including military victories, negotiated settlements and ceasefires, and “draws.” Three very different historical trends in the means by which civil wars have ended can be identified for the post–World War II period. A number of explanations have been developed to account for those trends, some of which focus on international factors and others on national or actor-level variables. Efforts to explain why civil wars end as they do are considered important because one of the most contested issues among political scientists who study civil wars is how “best” to end a civil war if the goal is to achieve a stable peace. Several factors have contributed to this debate, among them conflicting results produced by various studies on this topic as well as different understandings of the concepts war termination, civil war resolution, peace-building, and stable peace.


Our current era is one of profound changes and uncertainties, and one issue is to understand their implications for high-risk systems and critical infrastructures (e.g., nuclear power plants, ships, hospitals, trains, chemical plants). Normal Accidents (NA), Perrow’s classic published in 1984, is a useful guide to explore the contemporary epoch, in the third decade of the 21st century. One reason is that this landmark book has triggered a sustained interest by scholars who have debated, challenged, rejected, refined, or expanded its core thesis over almost now 40 years. With La Porte’s, Sagan’s, Vaughan’s, and Hopkins’s contributions into what can be described as the “standard NA debate” in the late 20th century and the more recent “new controversies and debates” by Downer, Pritchard, or Le Coze in the early 21st century, the book can still resonate with current changes in the 2020s. These changes include phenomena as large, massive, intertwined, consequential, and diverse as the advent of internet and of digital societies, the increase of transnational flows of diverse nature (people, data, capital, images, goods) and the ecological crisis captured by a notion such as the Anthropocene. Taking stock, historicizing, and revisiting NA with such debates and changes in mind leads to characterize a post-NA narrative.


Matthias Basedau

Political party systems are an important element of political systems in Africa and elsewhere. They form the central intermediate institution between the general population and the government. Party systems represent and aggregate diverse political views and group interests, and they form coalitions that then form governments with potentially important consequences of democracy and political stability. Unlike the case in the period directly after independence, African party systems have been overwhelmingly multiparty since the 1990s. As a result, the literature has grown significantly, although most works focus on political parties rather than party systems. Many efforts have been devoted to classification, referring to the legal context as well as, more specifically, the number of relevant parties, the levels of institutionalization, and, less often, the degree of ideological or other polarization. While levels of institutionalization and ideological differences are generally not pronounced, more than half of African party systems have been one-party dominant, of which most are authoritarian. In contrast, two-party and pluralist-party systems, which make up approximately one half of all multiparty systems, are generally more democratic. Besides determining classifications, most analytical work focuses on the determinants of African party systems using quantitative and qualitative as well as macro- and micro-level methodologies. Three determinants are debated: first, ethnicity, which has been cited as the main social cleavage behind African party systems; however, while ethnicity matters, its effects vary and are limited; second, political institutions, especially electoral systems for legislative elections, which only partly explain fragmentation or other features; third, the performance of political parties and rationalist approaches. Scholars largely agree that all of these elements need to be taken into account. While certain functions of party systems may facilitate democratization and political stability or other outcomes, little empirical work exists on the consequences of party systems. Some evidence suggests that highly institutionalized, moderately fragmented, and polarized systems promote democracy. Future research faces many challenges, in particular the development of integrated theory and more fine-grained data, as well as an increased focus on the consequences of party systems.