By providing new ways to securely identify individuals and organizations, and record transactions of various types in a distributed manner, blockchain technologies have been heralded as a new tool to address information asymmetries, establish trust and improve governance. The GovLab’s Blockchange initiative, supported by the Rockefeller Foundation, studies the promise and practice of leveraging blockchain to achieve social change objectives across three types of use case: identity, track & trace, and smarter contracting.