Ballet excels at defying gravity. Lightness, ethereality, wispiness, symmetry, lineal order, chivalry and blissful endings to well-worn tales bestow on ballet a reputation as an art form that embraces divine beauty and design. But themes of grief, trauma, death, war, annihilation, exploitation, abuse, oppression and genocide do not frequently skim the surface sur la pointe. Bearing weighty burdens has traditionally found a place in the realm of modern dance in works such as Martha Graham's Lamentation, or Paul Taylor's image of Armageddon in Last Look.

But beyond shimmering tutus and pristine arabesques, there are other reasons why heavy issues seldom appear on the ballet stage. Taking on a serious subject requires a serious treatment. A ballet about terrorism could easily trivialize the subject through melodrama or prettification. Classical vocabulary was born from noble demeanor in the royal courts; in the wrong hands, it can seem limited in registering the mood of a sordid subject or for expressing disturbing behavior. Add to that the industry's marketing directors and board members, tempted towards steering directors and choreographers away from challenging ballets for fear of poor ticket sales.

New York Theatre Ballet performs "Dark Elegies." Photo by Darial Sneed, Courtesy New York Theatre Ballet.