Time and Change

What is time?

Changism answers in one sentence:

Time is the derivative ledger of ordered change: the comparative and operational structure through which changing processes are counted, measured, coordinated, and represented, and through which objective metric relations among them are accessed, expressed, and compared.

Time is real, but it is not fundamental. It is real as an organization of comparison. It is not a container that holds events, a substance that flows, or a power that makes things change. Change comes first in the order of explanation. Time is the account that changing reality keeps of its own activity.

Three things, not one

The word time can blur three different things. Changism keeps them apart.

Change is what happens: concrete reality in act. Tissue is damaged, repaired and reorganized into a scar.

Immanent order is the structure within that activity. The scar depends on the wound; the wound does not depend on the scar. Repair answers to damage. This order is objective. It needs no observer, calendar or coordinate system, and it is there whether or not anyone ever dates the injury.

The ledger is how changes are compared. It includes clocks, counts, units, calibration, synchronization rules, records and calendars. It is the organization by which we can say that the repair took three weeks.

Time is the third of these. It is not change itself, and it is not the order within change. A dated list does not show that one entry caused the next. And the scar depends on the wound whether or not anyone wrote down a date.

What a clock actually does

Put a cup of tea beside a clock. The tea cools, and the clock’s quartz crystal oscillates. When we say the tea has been cooling for ten minutes, we are not reading off a flow that carries both of them. We are comparing one process with another. We count a stable oscillation, keep the count, convert it into a standard unit and show the result.

A clock is not a detector of some temporal substance. It is a physical process stable enough to serve as a reference for other processes. That is why it can fail in several distinct ways. Its crystal can keep oscillating while its display breaks. Its hands can be set wrong while its mechanism runs perfectly. Each failure concerns a different part of the ledger.

Real, objective, and not ours

Some readers will hear “ledger” and conclude that time is a convention or a fiction. It is neither.

Units and calendars contain conventions. Choosing minutes rather than seconds changes how an interval is written down, not what happened during it. But the physical relations that clocks track are not conventions. Relativity makes this plain. Two good clocks that separate, follow different paths and meet again can show different readings without either malfunctioning. No choice of units removes an actual difference in their accumulated durations. Changism preserves the objective proper duration of each path—what physics calls proper time. Clock counts give us access to it; they do not create it.

This leads to the sharpest consequence of the definition. Consider a stipulated physical history with objective duration relations but no relevant duration record and no implemented comparison. Its durations would still be real. What it would lack is time in the technical sense: the ledger that compares those durations. Such a history would have durations but no time in the restricted ledger sense. This shows that the ledger is not what makes durations real. Time does not produce the world’s metric structure. It is the organization through which that structure is counted, compared and coordinated.

A ledger also needs no human reader. Instruments count, retain differences and exchange signals whether or not anyone looks at them. An unread clock can still implement a ledger. The universe did not wait for us to invent clocks.

Lived duration is a separate phenomenon, and also a real one. An anxious wait can feel longer than an absorbing conversation of the same measured length. The feeling and the clock reading answer different questions, and neither needs to be explained away.

Past, ongoing, future: roles, not regions

If time is not a container, then past, present and future are not three regions of it. Changism treats them as three roles that activity plays. Take a chipped glass.

Past-role

The chip carries the consequence of an impact. Past-role consists of the records and inherited consequences through which earlier occurrences bear on later activity. The impact itself, and the traces it left, must be kept apart. Traces can be lost and reports can be wrong. Whether the impact happened depends on its having occurred, not on whether any evidence survives. If the glass is recycled and every record is lost, we may no longer be able to know what happened. That limits our knowledge; it does not change what occurred.

Ongoing-role

Someone is handling the glass. Fingers adjust their grip and the glass is held up. Ongoing-role is active process at its own locus. That locus is not a mathematical instant, and it includes maintenance as well as visible movement.

Future-role

The glass can break, because of its material and the way it is being handled. Future-role consists of the dispositions, constraints and admissible continuations carried by ongoing organization. The possible break is real as a capacity, not as an event hidden in the glass waiting to occur. A claim about the future is settled when every complete continuation allowed by the stated physical conditions agrees on whether it is true. It is open when those continuations disagree. Our ignorance alone does not make anything open.

No cosmic present

A detector registers a pulse in a laboratory, and a distant star radiates. Each is ongoing where it happens. Neither needs a further fact about which phase of the star’s activity is happening “at the same moment” as the detector’s click. Relativity supplies no frame-independent simultaneity relation between spacelike-separated events. Observers in relative motion who use valid synchronization procedures can disagree about which distant events count as simultaneous, even after accounting for signal delay. Causal order, however, does not depend on the observer. No change of frame puts a reception before the emission that caused it.

Changism states the commitment precisely:

Ongoingness is locus-indexed. A process is ongoing at its own locus. Changism does not posit an invariant field-wide relation of co-ongoingness between spacelike-separated processes, nor a global present slice, preferred foliation, or master clock.

There is no universal “now”, and nothing is missing without one. Lacking access to a distant event limits what we know. It does not take away that event’s reality.

Doesn’t change already presuppose time?

It would, if change meant “different states at different times”. Changism does not define it that way. It starts from productive activity, from what processes do to one another. The order exemplified by the wound and scar is an asymmetry within that activity: repair responds to damage, and the scar inherits from the wound. Comparison through a ledger tracks that order; it does not supply the productive connection.

Changism takes structured productive activity as primitive. It does not begin with orderless change and then try to manufacture order from it. The priority is explanatory, not chronological: the ledger depends on organized activity. The proposal is that directed organization belongs to activity itself, rather than being supplied by a separately fundamental temporal order.

Productive dependence, order along a history and metric duration still do different jobs. One event need not produce every later event. The wound–scar relation alone cannot tell us how many seconds healing takes. Merely renaming “before” would accomplish nothing. The real test is whether the account can explain the order and measurement we actually rely on without secretly assuming the temporal structure it claims to derive. Changism accepts that test.

What must a theory of time explain?

Saying which events exist does not, by itself, explain what orders them, why their durations have the relations they do, or how clocks measure those relations. These are connected questions, but an answer to one cannot simply stand in for answers to the others.

Imagine two clocks that reunite after accumulating twelve and ten seconds of proper duration. A comparator displays a difference of two. A faithful comparison can produce that numeral; so can a disconnected display preset to two. The same number appears, but only one device has compared the clocks. If a stored reading was corrupted before subtraction, a perfectly correct calculation can report a false duration difference. The claim’s truth, the comparison’s operation and the evidence supporting the reading are distinct.

This is why Changism separates productive activity, objective metric relations and implemented comparison. Explaining how a clock works does not yet explain what grounds the durations it measures. Equally, listing which events exist does not explain how a record acquires evidential authority. A theory earns its explanatory reach by connecting these tasks.

What is claimed, and what remains open

Changism’s proposal concerns the direction of explanation: productive activity is basic, order belongs within it, and temporal ledgers organize comparison. It is an ontological interpretation, not a new experimental result. Relativity constrains it without selecting it uniquely.

A block-universe account can also describe interactions, records and the causal routes that make records reliable. Some versions can accept genuine productive dependence. Changism’s challenge is therefore not answered by showing that a block contains a record, but neither is it won by repeating that records are produced. The disagreement concerns what grounds their production and what an ontology of concrete being-underway explains that an equally actual total history does not. Changism takes concrete productive activity as fundamental; the comparative argument must establish what this explains beyond productive eternalism.

Finite formal models already make parts of the account precise under stated assumptions: local activity without a cosmic present, and the difference between settled and open claims about the future. Three tasks remain open. The first is explaining how objective metric structure is grounded in a world of processes. Order on its own does not tell us how many seconds separate two events. The second is identifying and combining processes across scales. The third is giving a complete account of historical and future truth.

The central claim is definite: productive activity is basic; time, in its technical sense, is the derivative ledger through which ordered change is compared. The research task is to establish how far that direction of explanation reaches, including the grounding of objective metric relations and its advantage over the strongest alternatives.

Read further

Begin with Changism, Volume I, Part I: Chapters 1–3 on change, clocks and order; Chapter 5 on past, ongoing and future; Chapters 7–8 on relativity and the absence of a cosmic present; Chapter 17 on historical truth.

For the technical arguments, see Research: “Before and After Without Time: Immanent Order, Metric Comparison, and the Ledger”; “Local Activity Without a Cosmic Present”; and “An Unsettled Future Without Future Objects.”

Continue exploring: Things and Identity asks how something can persist through change. Causation and Dependence asks what it means for one process to make a difference to another. Truth, Records, and Knowledge asks how what happened differs from what we can establish about it.

Chapter numbers refer to the second edition of Changism, Volume I.