Invisible People

Today would be the birthday of Ralph Ellison, most well-known for his work The Invisible Man which opens with the famous passage,

"I am an invisible man. I am a man of substance, of flesh and bone, fiber and liquids - and I might even be said to possess a mind. I am invisible, understand, simply because people refuse to see me."

The question today is who, in contemporary society? Who is it that we choose not to see?