The (re)solve project accelerates the pace of contraceptive uptake among women and girls in the developing world. Through its unique, cross-disciplinary approach, (re)solve challenges current assumptions and tests new approaches based on context-specific behavioral insights, generating adaptable, scalable solutions that address unmet need for family planning. Our program will develop new and innovative solutions that can be effectively applied to improve decision making about use and continuation of modern contraception and to gain insights on fertility preferences, method-specific perspectives, the role of men and masculinity, gender, and household dynamics and increase evidence and programmatic understanding on how and when to apply cost-effective cross-disciplinary levers and approaches to test new solutions and improve existing interventions to increase the modern contraceptive prevalence rate. Our program will also increase uptake of effective ways to apply cross-disciplinary approaches in designing, implementing, and monitoring interventions to better address reasons for non use, and bring together the consortium of partners—ideas42, Camber Collective, and International Center for Research on Women—to deliver real, lasting change