DAOstack is an operating system for a new form of organization: the DAO. Decentralized Autonomous Organizations have captured the imagination of the best minds in the blockchain space, but despite their promise have yet remained an abstract idea. One key point of failure is the lack of solid framework for decentralized blockchain governance. At the base of the DAO stack, Arc1 is an open, universal framework of smart contracts for decentralized governance and collective value management over the blockchain. Just as HTTP allows the creation and interoperability of web sites and web applications, DAOstack allows the creation andinteroperabilityofwebcompanies, collaborationappsandDAOs,aswellasthealignmentoftheirinterests. The result is a new web of open collaboration, in which collectives can self-organize around shared goals and values, beyond pure economic growth. We believe this will be a critical step in the evolution of society toward a more cooperative and sustainable future.