More and more, we present ourselves and encounter others through profiles. A profile shows us not as we are seen directly but how we display ourselves to a broader public. As we observe how others observe us, we calibrate our self-presentation accordingly. Profile-based identity is evident everywhere from pop culture to politics, marketing to morality. In You and Your Profile: Identity After Authenticity, Hans-Georg Moeller and Paul J. D’Ambrosio argue that the profile marks an epochal shift in our concept of identity and demonstrate why that matters. They outline how profile-based identity works, how we readily apply it in our daily lives, and how it shapes our values—personally, economically, and ethically.