Infancy research and philosophy explore “first things,” yet few books bring the two fields into contact. Stephen Langfur’s Philosophy Meets the Infant integrates groundbreaking infancy studies of the last 50 years to offer a fresh exploration of our drive for human connection. He begins with a new understanding of self-awareness, which he locates in reciprocal attention between baby and caregiver. Instead of “I think, therefore I am,” the new research supports “You attend, therefore I am.” The event of becoming self-aware through another is termed a “You-I Event.” The idea is counterintuitive: we are perfectly self-aware when alone! To explain the change after infancy, Langfur makes transformative use of an old psychoanalytic finding. With the onset of language, a child internalizes (introjects) the most important You’s, playing them toward herself in speech. Instead of the original You-I Event, we have its counterfeit in our heads. Nevertheless, a longing for the true Event persists