Mark Heller is a contemporary analytic philosopher specializing in metaphysics, particularly the metaphysics of material objects, persistence, and modality. He is best known for defending four-dimensionalism, the view that material objects persist through time by having temporal as well as spatial parts. His work engages questions about vagueness, possible worlds, and ontology.
Developed an influential defense of four-dimensionalism in 'The Ontology of Physical Objects' (1990)
Argued for temporal parts as the correct account of material object persistence
Contributed to the metaphysics of vagueness and indeterminate identity
Advanced views on the relationship between propositions and possible worlds
Engaged with inscription and token-type distinctions in philosophy of language
The truth of a proposition in a world does not entail that the proposition exists in that world