"We live in a museum age," writes Steven Conn in Do Museums Still Need Objects? And indeed, at the turn of the twenty-first century, more people are visiting museums than ever before. There are now over 17,500 accredited museums in the United States, averaging approximately 865 million visits a year, more than two million visits a day. New museums have proliferated across the cultural landscape even as older ones have undergone transformational additions: from the Museum of Modern Art and...