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Universal causation

Universal causation is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Universal causation rather than just read about it. In short: Universal causation is the proposition that everything in the universe has a cause and is thus an effect of that cause. This means that if a given event occurs, it is necessarily the result of a previous, related event.

Key takeaways

  • Universal causation belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Universal causation to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Universal causation from memory before moving on to harder problems.

Reference excerpt

Universal causation is the proposition that everything in the universe has a cause and is thus an effect of that cause. This means that if a given event occurs, it is necessarily the result of a previous, related event. If an object is in a certain state, then it is in that state as a result of another object interacting with it previously. Western philosophy has been concerned with the idea of universal causation for ages. The authors' formulations however contain profound differences in methodology and philosophical assumptions. Contemporary philosophers who believe in exception-less, universal, fundamental laws of nature are referred to as "fundamentalists" ; those who reject such a position are referred to as "pluralists". The latter category is minoritary in modern debate.

Diverse formulations In addition, everything that becomes or changes must do so owing to some cause; for nothing can come to be without a cause.Causality is universal. Nowhere in the world can there be any phenomena that do not give rise to certain consequences and have not been caused by other phenomena. In contrast, Bertrand Russell argued (in 1912) that the law of causation as usually stated by philosophers is false and is not used in sciences (maybe with exception of their infancy). However his position on universal causation evolved and "was not as naive as it may have appeared". In 1927 Russell writes that the notion of universal causation marks the beginnings of science and philosophy.

As axioms of causality According to William Whewell (hypothetico-deductivist view) the concept of universal causation depends on three axioms:

Nothing takes place without a cause. The magnitude of an effect is proportional to the magnitude of its cause. To every action there is an equal and opposed reaction. Whewell writes that the first axiom is so clear that it requires no proof if only the idea of cause is understood.

Example Example for the axiom: if a baseball is moving through the air, it must be moving this way because of a previous interaction with another object, such as being hit by a baseball bat.

Criticism An epistemological axiom is a self-evident truth. Thus the "Axiom of Causality" claims to be a universal rule that is so obvious that it does not need to be proved to be accepted. Even among epistemologists, the existence of such a rule is controversial.

As Law of Universal Causation or Principle of Universal Causation (PUC) John Stuart Mill describes the Law of Universal Causation in following way:

Every phenomenon has a cause, which it invariably follows; and from this are derived other invariable sequences among the successive stages of the same effect, as well as between the effects resulting from causes which invariably succeed one another. Contrary to hypothetico-deductivists Mill focuses on inductive reasoning and observations in framing of the Law of Universal Causation i.e. uses basic features of experimental methods and convinces, after critical analysis, that this law is proved by induction better than any other of subordinate generalizations.

The belief we entertain in the universality, throughout nature, of the law of cause and effect, is itself an instance of induction. Also popular proof and answer to skepticism (for instance that of David Hume) is that PUC has been true in so many cases, that (using basic inductivist scientific method enumerative inductive reasoning) it is reasonable to say that it is true in every case, moreover counter-example i.e. event that does not have a cause is hard to conceive.

Criticism Modern version of law of universal causation is connected with Newtonian physics, but is also criticized for instance by David Hume who presents skeptical reductionist view on causality. Since then his view on the concept of causality is often predominating (see Causality, After the Middle Ages). Kant answered to Hume in many aspects, defending the a priori of universal causation. In 2017 book Robert C. Koons & Timothy Pickavance point out four objections to Universal Causation:

If we additionally assume mereological universalism, universal causation doesn't exclude self-causation, which is controversial. Pluralized causal principle - there are pluralized versions of universal causation, that allow exceptions to the principle. Robert K. Meyer's causal chain principle, uses set theory axioms, assumes that something must cause itself in set of causes and so universal causation doesn't exclude self-causation. Against infinite regress.

Spontaneity One implication of Universal Causation is that if a phenomenon appears to occur without any observable external cause, the cause must be internal.

Variation Another implication of the Universal Causation is that all change in the universe is a result of the continual application of physical laws.

Determinism If all events are cause and effect relationships that follow universal rules, then all events—past, present and future—are theoretically determinate.

First Cause and possible exceptions

If all effects are the result of previous causes, then the cause of a given effect must itself be the effect of a previous cause, which itself is the effect of a previous cause, and so on, forming an infinite logical chain of events that can have no beginning (see: Cyclic model), however usually it is assumed that there is one (see: Big Bang, the religious belief in Creationism or pseudo-scientific idea of Intelligent design). Exception for the Universal Causation - First Cause is sometimes pointed out to be logically necessary for it to not contradict itself. An infinite chain of events is hard to conceive in a finite world. The answer is a looped chain of events. But this is also questioned as the whole loop would have no cause. However it can not be ruled out that the Universe is infinite in time or can expand infinitely. Other exceptions are pointed out - only every of the following things are caused:

contingent and unnecessary, causable, that have beginning, finite.

See also Principle of sufficient reason Trademark argument Causal adequacy principle Causality principle Uniformitarianism – Assumption that natural laws are constant through time and space

References

External links "The Axioms". MetaMath. Machan, Tibor R. (Nov 9, 2009). "Universal causality: Can We Cause Our Actions?". Archived from the original on March 5, 2016.

Worked examples

Example 1 — a first encounter with Universal causation

Start with the simplest possible case. Write down what Universal causation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Universal causation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Universal causation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Universal causation

In research
Universal causation appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Universal causation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Universal causation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Causality, Metaphysical principles, Philosophy of physics, so understanding it makes those chapters shorter.
In everyday life
Look for Universal causation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Universal causation in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Universal causation means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Universal causation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Universal causation in simple terms?

Universal causation is the proposition that everything in the universe has a cause and is thus an effect of that cause. This means that if a given event occurs, it is necessarily the result of a previous, related event.

Why does Universal causation matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Universal causation?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Universal causation.

Tags

  • Causality
  • Metaphysical principles
  • Philosophy of physics
  • Philosophy of science

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