European colonialism in Africa was brief, lasting less than a century for most of the continent. Nevertheless, scholars have enumerated myriad long-term political effects of this brief period of colonial rule. First, Europeans determined the number, size, and shape of African states through their partition of the continent, with contemporary implications for state viability, strength, and legitimacy. Second, colonial rule influenced the nature of ethnic boundaries and their salience for politics through the use of indirect rule, language and labor policies, and the location of internal administrative boundaries. Third, colonial rule significantly shaped the nature of postcolonial state-society relations by divorcing the state from civil society during the colonial era and by engendering deep mistrust of the state as a benevolent actor. Fourth, many colonial institutions were preserved at independence, including the marriage of state institutions and customary rule, with deleterious effects. Fifth, differential colonial investments across communities and regions generated significant inequality, with continued political implications in the 21st century. The identification of these long-term effects has largely resulted from empirical comparisons across different forms of colonial rule, especially comparing territories administered by different colonial powers. Future research should move beyond this blunt approach, instead pursuing more disaggregated and nuanced measures of both colonial rule and its political legacies, as well as more scholarship on the long-term interaction between colonial and indigenous political institutions.