"first and second world" describes more or less the same set of countries (perhaps modulo some eastern european countries like you said), but doesn't it have most of the same baggage as "developed nations"? as I understand it, the problem with "developed nations" is that it raises the question "developed compared to what?". in other words, it implicitly sets the west as the standard against which "developed" is measured. doesn't first/second/third world center the western perspective in pretty much the same way?