Global development programs are increasingly aware of the importance of addressing human heterogeneity to drive outcomes. Segmentation, especially psycho-behavioral segmentation, has tremendous potential for helping programs to target the right person with the right intervention at the right time to drive change. But its adoption has been limited. Surgo Foundation brought together key stakeholders and thought leaders to discuss how organizations can address human heterogeneity in programs, and the potential for using segmentation to help design and deploy targeted interventions that drive change.