Francis Lieber (1798-1872), one of the first university-trained German scholars to migrate to America, served as a bridge between the intellectual and political cultures of Germany, England, and America. While cultivating an astonishing range of activities and interests, Lieber helped lay the foundation of academic political science in America and promoted its practical application to public affairs. His theory of institutional liberty, which attributes the rise of civil liberty to the development of an increasingly integrated complex of self-governing institutions, may be his most original contribution to the political science literature.