When The New Press, the Center for American Progress, and the Formerly Incarcerated and Convicted Peoples and Family Movement issued a call for innovative reform ideas, over three hundred currently and formerly incarcerated individuals responded. What We Know collects two dozen of their best suggestions, each of which proposes a policy solution derived from their own lived experience. Ideas run the gamut: A man serving time in Indiana argues for a Prison Labor Standards Act, calling for us to reject prison slavery. A Nebraska man who served a federal prison term for white-collar crimes suggests offering courses in entrepreneurship as a way to break down barriers to employment for people returning from incarceration. A woman serving a life sentence in Georgia spells out a system of earned privileges that could increase safety and decrease stress inside prison. And a man serving a twenty-five-year term for a crime he committed at age fifteen advocates powerfully for eliminating existing financial incentives to charge youths as adults. With contributors including nationally known formerly incarcerated leaders in justice reform, twenty-three justice-involved individuals add a perspective that is too often left out of national reform conversations.