Do some objects have essential properties—properties that they could not lack and which play some role in characterizing their nature? Essences play a starring role in recent debates about metaphysical modality and methodology. In recent work, I investigate potential anti-essentialist arguments. I am also interested in the best approaches to modal conventionalism—in particular, the view that modal truths depend on explanatory conventions. Such theories often presuppose anti-realism, but I argue there are viable realist variants. Even more generally, I am interested in the ontological implications of modal logic, the ontological commitments of possible-worlds semantics, and versions of modal logic that do not take operators as structural. And in my Time Biases book I consider when and why it might be rationally permissible to form preferences over metaphysical impossibilities. The connection between modality and value reappears in the current ethical commitment manuscript.