Humans begin as tiny clumps of cells. Somehow, we evolve into mature individuals with unique personalities. I wanted to dissect that process and discover how babies develop a sense of identity. In this podcast, I speak with Peter Gordon at Teacher’s College, Columbia University and Catherine Tamis-LeMonda at New York University to learn about the milestones that mark the development of identity. I also interview Katie Moisse and her daughter Lou to watch the process unfold.