Piotr Sztompka presents a comprehensive theoretical account of trust as a fundamental component of human actions. Professor Sztompka's detailed and systematic study takes account of the rich evolving research on trust, and explains its meaning, foundations and functions. He illustrates and supports his claims with statistical data and his own impressive empirical study of trust, carried out in Poland after the collapse of communism. This conceptually creative and elegant work will be of interest to scholars and students of sociology, political science and social philosophy.