Explore a Stanford seminar on advancing human-machine interaction through data-driven understanding of human behavior and language. Delve into Ethan Fast's insights on developing systems that capture and interpret daily human activities, from simple to complex. Discover how this technology can drive public policy, detect gender bias, and shape community-building interfaces. Learn about the importance of acquiring data and creating models that enable machines to better understand and respond to human actions, ultimately leading to more integrated and effective computer systems in our lives and society.