Presentism

Presentism's intuitive appeal rests on taking ordinary tensed language at face value: when someone says a historical figure lived and died, or that an event will happen next week, the natural reading is that the dead figure genuinely does not exist any longer and the future event genuinely does not exist yet, not merely that both are located at times other than the present, as eternalism would have it. On this view, the passage of time is not an illusion generated by an observer's limited perspective on an already complete four-dimensional block, but a real, ongoing process in which new moments of reality come into being and old ones genuinely cease to be, one after another, so that the world is metaphysically growing, or at least metaphysically changing, rather than sitting complete and static.

The position's most serious difficulty is reconciling this picture with special relativity, which denies that there is any single, physically privileged present moment shared by all observers everywhere, since what counts as simultaneous with here and now differs depending on an observer's velocity; presentists have responded in several ways, some restricting the theory's scope to a preferred reference frame, others arguing relativity describes only how time is measured rather than settling the deeper metaphysical question of what is ultimately real, though neither response has fully persuaded critics who take relativity's verdict on simultaneity at face value.

Presentism is closer to what most religious and everyday thinking about time simply assumes without argument: prayer for the future, mourning for the past, and moral urgency about the present all make most straightforward sense if the future genuinely does not yet exist to be already decided and the past genuinely no longer exists to be revisited, which is part of why process theology, with its emphasis on a God who genuinely experiences the world's ongoing becoming moment by moment, sits closer to presentism in spirit than to a static eternalist block, even where it does not adopt the philosophical label explicitly.

Cyclical time traditions complicate the simple presentist picture in their own way, since a strictly cyclical cosmos, in which the same ages recur, sits awkwardly with presentism's assumption that once a moment has passed it is simply gone rather than due to recur again in substantially the same form. Physicists and philosophers of physics remain divided on whether relativity truly rules presentism out or merely complicates its formulation, which keeps this among the most actively unresolved disputes in the metaphysics of time, contested on scientific as much as philosophical grounds.