If you haven’t seen any of Glenn Ligon’s work, you probably should. (Google him if you don’t have access to the Studio Museum or the Whitney). His work is often controversial, which means it makes you think. About what? What it is to be an American, a man, a black man, a gay man. What if you’re none of those things? Well, maybe you are marginalized in some way. Are you a woman? Are you poor? Do you have access to a less than excellent education? Do you know someone who is any of those things?