Stephan:   Cuba, which for several decades was at the center of America's interests, has faded from popular awareness. Yet it endures as a social model, is extraordinary to watch, and has much to teach us. Like North Korea it is a family fief, indeed by system they are first cousins -- if as different as first cousins can be. I think it is important to understand Cuba, and what is happening both there, and in the U.S., where Cuba was once the key to Florida politics. To that end: this is a very intelligent assessment of what is going on today, on this island outlier nation.