Beneficial social and economic exchange relies on a certain level of trust. But trust is a delicate matter, not least in the former socialist countries where illegitimate behaviour by governments made distrust a habit. The chapters in this volume analyze the causes and the effects of the lack of social trust in post-socialist countries. The contributions originated in the Collegium Budapest project on Honesty and Trust: Theory and Experience in the Light of the Post-Socialist Transition. A second volume entitled, Building a Trustworthy State in Post-Socialist Transition , is being published simultaneously.