One would think an eminent college professor, particularly one in the field of English literature, would know this. But no: "Who were the principle players?"
From Stanley Fish's blog post on a proposal by the University of Colorado to have a Chair on Conservative Thought and Policy. (He's against.)
I know, I'm showing my age (and my blue pencil past) but such mistakes gripe me. (And don't get me started on "its" and "it's", which no one these days knows how to use.