This chapter identifies the colonial origins of the institutional structures and patterns of uneven economic development that create the template for political regionalism in African countries. Functional economic regions and administrative regions tended to align in African colonies, defining patterns of regional difference and inequality that are often strongly visible today. This process established frameworks within which politically salient ethnic identities developed, and defined political constituencies in territorial terms. With the 1940s emergence of colony-wide politics, existing administrative and political structures channeled regional interests and ideologies of regional consciousness into the national arena. A boundary persistence analysis underscores the large extent to which colonial territorial grids have been reproduced over time. I explain this persistence in terms of how African political leaders, social elites, farmers, and members of rural communities found advantage in territorial institutions forged under colonialism. These regional cleavages and the territorial institutions that help to reproduce them have structured patterns of national-level political competition in many African countries for many decades.

Regional competition in African countries finds expression in tensions, debates, and competition over policy. Regional economic tensions in African countries tend to find expression in four persistently salient issue areas: (a) demand for redistributive policies and social policy, (b) region- and sector-specific development and regulatory policies, (c) land policy, where redistributive tensions and conflicts arise in the building of national land markets, and (d) issues around state structure and design (the territorial division of powers and prerogatives, as under federalism or decentralization). In most countries, regional cleavages trump class-like or interpersonal income inequalities as a driver of national contestation over issues of policy and collective choice. A 2x2 matrix predicts “regional preferences for decentralization and redistribution” based on a region’s relative economic standing and its political alignment with the center. South Africa, where regional inequality is lower and nationalizing institutions are stronger, is an outlier: Redistributive social policy is more developed than it is anywhere else in Africa, and the issue of national land market integration is less salient than it is in many African countries.

This chapter explores relationships between regional economic advantage and regional political advantage, making two arguments. The first is that relative political advantage among the regional electoral blocs tends to map onto the economic hierarchy of regions. This conforms to the theoretical expectation that politically dominant blocs tend to be economic leaders as well (see Gourevitch 1979). A corollary is that when relatively advantaged regions are out of power, they are likely to constitute a rival electoral bloc or an opposition-leaning zone. The second argument analyzes the formation of national winning electoral coalitions. Evidence from the 12-country study suggests that national electoral coalitions are built mainly via the ability of incumbent blocs to mobilize electoral support in constituencies in the weakly organized non-bloc areas. The most common alliance structure is alliances of the extremes (richest and poorest regions) against the middle. Similar patterns of alliance have been noted for countries cleaved by high spatial inequalities in other parts of the world. These coalition patterns tend to reproduce regionalism in national politics.

Does regional inequality give rise to political cleavages in African countries? If so, why and how? At what scale of politics? How do regional difference and inequality shape national politics and policy? The theory of regional politics advanced here is drawn from comparative politics theories of regional tensions that arise in the course of state-building and national economic integration. These are accentuated when socioeconomic inequality and territorial institutions align. This book argues that regional economic differentiation and spatial inequalities, in interaction with strongly territorial state institutions, shape politics and policy in African countries as they do in countries in other parts of the world. National economic integration and state-building activate subnational interests and fuel political tensions over the integration of subnational regions into the national polity and the national market. Regional economic and political heterogeneity and cross-regional inequalities shape both preferences and the relative bargaining power of subnational collectivities. These forces combine to produce persistent regional cleavage structures in national politics. Empirical support is drawn from electoral data from 44 elections across 12 countries, historical maps, and nighttime luminosity, household survey, and crop production data.