Museum exhibitions have traditionally been based on some concept of sameness: works are gathered together either because they were made by the same artist or by artists from the same school, period, or country, or because they manifest the same theme, style, politics, or some other selective slice of sameness from the world of differences roundabout. The more venturesome shows often arouse a suspicion that the criterion of choice has created an impression of orderly sameness where another might have pointed as emphatically to difference. Yet curators, who are generally more involved in promoting