This book investigates the theoretical and practical implications of blockchain and other distributed ledger technologies for democratic decision making. What new structures of democracy does blockchain technology enable? A cryptodemocracy is cryptographically-secured collective choice infrastructure on which individuals coordinate their voting property rights. Drawing on economic and political theory, a cryptodemocracy is a more fluid and emergent form of collective choice. This book examines these theoretical characteristics before exploring specific applications of a cryptodemocracy in labor bargaining and corporate governance. The analysis of the characteristics of a more emergent and contractual democratic process has implications for a wide range of collective choice.