Ed Zigler believed that developmental science should be applied to policy, programs, and practices to improve the lives of children and families. He shared this belief with others and paved the way for alternative career pathways. This paper describes how Ed influenced others to connect science with program development, evaluation, and policy, and created networks of applied scholars. Ed Zigler's influence is broad and spans beyond academia to influencer organizations. We weave our own professional experiences throughout the paper, which we organized around three lessons we learned from Ed: (a) explore alternative career pathways and build the field; (b) start with the science and think application; (c) apply the knowledge and influence policy.

We present this article as a testament to Ed Zigler's commitment to science in the service of humanity and to policy based on conceptually compelling theory and methodologically rigorous science. In doing so, we highlight ways that Ed's universal and inclusive developmental world view, early training as a behaviorist, exacting scientific standards, concern for others, and appreciation of his own roots and upbringing all transformed the way that many different groups of people of all ages and backgrounds are studied, viewed, and intervened with by researchers, policy makers, and society at large. Ed's narrative of development rather than defect, universality rather than difference, and holistic rather than reductionist continues to compel us in the quest for a kinder, more inclusive, and enabling society. Conversely, Ed's behaviorist training as a graduate student also influenced him throughout his career and was essential to his career-long commitment to systemic action in the service of improving the lives of others. We cite the lessons that we, as his descendants, learned from Ed and apply them to our own areas of research with populations that Ed did not study, but had considerable interest in – persons with autism spectrum disorder and Indigenous youth.