The first comprehensive mid-career retrospective devoted to pioneering New York–based artist Glenn Ligon ’82 is being held at the Whitney Museum of American Art (45 Madison Ave. at 75th Street, 212-570-3600) in New York City through June 5. The exhibition, "Glenn Ligon: AMERICA," features about 100 works, including paintings, prints, photography, drawings, and sculptural installations, as well as striking recent neon reliefs, one of them newly commissioned for the Whitney’s Madison Avenue windows. Over the course of his career, Ligon has created a body of work that has explored American history, literature, and society as it has built critically on the legacies…