Chapter 1 provides a brief overview of some of the key milestones in dyadic health science over the last few decades. The chapter includes tables that document the history of dyadic health science, including major publications, conferences, and organizations that served as the foundation for the field. We end the chapter with several journeys into dyadic health research from the many interviews we conducted (e.g., David Kenny, Niall Bolger, Karen Kayser, Laurel Northouse, Hoda Badr), as well as our own individual journeys and seminal influences to provide needed context and positionality for the book.