ART21 is an award-winning series of 24 programmes in which 100 contemporary artists talk about their creations, the way they work and their individual view of art. How does contemporary art address the idea of identity? How do artists working today reveal and question commonly held assumptions about stereotypes, self-awareness, portraiture, and what it means to be an artist? The “Art in the Twenty-First Century” documentary “Identity” explores these questions through the work of the artists Bruce Nauman, Kerry James Marshall, Maya Lin and Louise Bourgeois, including an introduction by William Wegman and actor Steve Martin.