ABSTRACT
In this chapter, I discuss the distinction between essential and accidental properties from a contemporary perspective. I first distinguish between the modal notion and the Aristotelian notion of essence. I present various ways of cashing out the modal notion, and then I turn to the Aristotelian notion, which has been at the centre of metaphysical enquiry over the past thirty years or so. I present and discuss simple modal accounts of that notion, then sophisticated accounts and finally non-modal accounts. In the very last part of the chapter, I briefly go through various topics: individual essences; the question of what is essential to what; the use of essence in the characterization of other notions; so-called generic essence and other generalizations of the standard, objectual notion of essence; and finally, scepticism and anti-realism about essence.
