This paper establishes a simple model of long run economic and political development, which is driven by the inherent technical features of di¤erent production factors, and political con ‡icts among factor owners on how to divide the outputs. The main capital form in economy evolves from land to physical capital and then to human capital, which enables their respective owners (landlords, capitalists, and workers) to gain political powers in the same sequence, shaping the political development path from monarchy to elite ruling and …nally to full su¤rage. When it is too costly for any group of factor owners to repress others, political compromise is reached and economic progress is not blocked; otherwise, the political con ‡icts may lead to economic stagnation.JEL: O10, O40, P16, N10.