I was so honored to deliver the Carmelo Mesa-Lago Keynote Lecture at the Latin American Social and Public Policy Conference last Friday at the Center for Latin American Studies at the University of Pittsburgh. Drawing on my work on engaged research and public engagement practice, I shared insights on "The Power of Collective Knowledge in Social and Public Policy Research and Practice." While universities are organized around asking faculty, staff, and students to focus on and demonstrate what we know, an equally important focus should be on what we don't know, asking ourselves...Who knows? How can I connect with them? How can I respect them? How can I learn from and with them? How can we work together? There is incredible power in collective knowledge that engages the expertise held by communities, practitioners, and more. The complexity of our world and the challenges that we face ask us to work differently. We need ALL of the experts.