With data from 15 Indian states, in this study I demonstrate that political capacity, defined as the ability of government to penetrate society and extract resources, has a more significant—though indirect—effect on fertility behavior than does level of economic development. A path-analysis model with six variables—crude birth rate (the dependent variable), family-planning-program effort, mean female age at marriage, physical-quality-of-life index (PQLI), income per capita, and political capacity—showed a strong indirect effect by the political-capacity measure on fertility decline through both the PQLI and family-planning effort. Within the model, income per capita had little effect on birth rate or any of the intervening variables. The conclusion drawn is that under conditions of economic backwardness as exist in India, it is politics, not economics, that is the primary determinant of fertility patterns.