Omnivores — defined by sociologists as people who regularly participate in a broad range of cultural activities — represent a small minority of the population, but a large portion of the arts audience. In a new analysis recently released by the National Endowment for the Arts, author Mark J. Stern concludes that this engaged, energetic group is both shrinking in size and becoming less active. In Age and Arts Participation: A Case Against Demographic Destiny, he argues the largely unexplained diminution of this group is a key reason attendance at arts events continues to dwindle.