Art is not politics. The glory of the novel is that in its essence, it is a democratic form, because it treats individuals as worthy of scrutiny. That alone is a kind of political act. A good novel about a tea party of rich women can be just as galvanizing and important to the soul as War and Peace, so I think it's not really the job of artists to do anything. They can have their opinions as private citizens, but they must continue making their art.