according to presentism only the present is real: all that exists exists in the perpetual present (in my use of the term, presentism does not imply that time is absolute). The past refers to a configuration of the universe that no longer exists, whereas the future represents a yet-to-be-determined configuration. Under eternalism, time has been spatialized into a full-blown dimension in which the past, present, and future are equally real. The universe becomes a four-dimensional “block” with one temporal and three spatial dimensions—the so-called block universe.3
