Muslim vs. Moslem

Remember years ago how people of Islamic faith were mostly referred to as Moslems? Now you mostly see and hear Muslim. How come?

It’s not so much that we’ve done this before, as it is that we did this two days ago.

Sorry about that. I am not a regular to GQ and thought I had such a new and original question that I didn’t even bother to check. Mods, feel free to close this thread.