Dr. Paul Zeitz is a democracy activist, preventive medicine physician, epidemiologist, author, and award-winning champion of global justice and human rights. Drawing from over 35 years of advocacy, campaigning, and political movement leadership, Zeitz co-founded #unifyUSA, an inter-partisan citizens' movement dedicated to hitting refresh on the U.S. Constitution through the power of Citizens’ Assemblies. His prior career work spans diverse sectors, including climate transformation, racial and gender equity, authentic democracy, sustainable development, child welfare, and global health. Zeitz is the author of four books, including Hit Refresh on the U.S. Constitution: A Revolutionary Roadmap for Fulfilling the Promise of Democracy and Revolutionary Optimism: Seven Steps for Living as a Love-Centered Activist.