This paper mentions several different sorts of "essentialism," and examines various senses in which quantified modal logic is "committed to" the most troublesome kind of essentialism. It is argued that essentialism is neither provable, Nor entailed by any contingently true non-Modal sentence. But quantified modal logic is committed to the meaningfulness of essentialism. This sort of commitment may be made innocuous by requiring that essentialism simply be made logically false; some of the consequences of taking this line are explored.