Wouldn't you say that what I described is description?
I know that there is a word for it, but ever thought that the word egalitarianism might not fit that well in a stamp? And the first rule in life is that you shouldn't make it all too complicated for your audience, because people don't want to put that much effort in thinking. A scenario like 'what is egalitarianism? I'll just go and grab a dictionary so I know what this stamp means' - is not going to happen.