Reality+

Reality+ examines the metaphysical and epistemological status of virtual worlds in light of contemporary technology and philosophy of mind. Chalmers argues that virtual worlds are genuinely real—not mere illusions or simulations—and explores implications for consciousness, identity, and value. The book synthesizes philosophy, cognitive science, and technology studies to address questions about what makes something real, whether we can know we're not in a simulation, and how virtual experiences relate to physical ones.

The work is structured around core philosophical problems: the simulation hypothesis, the nature of virtual objects, the possibility of virtual consciousness, and ethical questions about digital existence. Chalmers draws on thought experiments, contemporary VR/metaverse developments, and classical philosophical debates to argue that reality is not limited to the physical. The book has become influential in discussions of digital ontology, metaverse philosophy, and the future of human experience.