1991

Piper publishes "Impartiality, Compassion and Modal Imagination." Exhibits What It's Like, What It Is #1 at the Washington Project for the Arts, What It's Like, What It Is #2 at the Hirshhorn Museum, and What It's Like, What It Is #3 at the Museum of Modern Art. Twenty-year retrospective travels in England and Germany. Art world rehabilitation continues. Publishes "Passing for White, Passing for Black." Collapses twice from physical exhaustion, ends spring semester on medical leave. Curtails speaking and writing commitments.