Skip to content
Coordinates of ThoughtHome of Philosophy
Join

Determinism

Updated 29 October 2026

On this page
  1. What it means
  2. The questions it belongs to
  3. Thinkers
  4. Traditions
  5. Sources and further reading

The view that every event is fixed by earlier events together with the laws of nature.

Also: causal determinism, hard determinism, Laplace's demon

What it means

Causal determinism says that, given how the world is at one moment, the laws of nature fix everything that happens afterwards. Pierre-Simon Laplace imagined an intelligence that, knowing every force and position at one instant, could calculate the entire past and future. Determinism differs from fatalism, which says certain outcomes will happen whatever we do, and from predictability, since a deterministic world might still be impossible to forecast in practice. Whether our world is deterministic is unsettled: standard quantum mechanics is usually read as indeterministic, but some interpretations are deterministic. The main philosophical worry is free will: if the past and the laws fix your choices, could you have done otherwise?

The questions it belongs to

Thinkers

Traditions

Sources and further reading

Written by the Coordinates of Thought editors and checked against the sources above on 29 October 2026. Not peer-reviewed. How we write and check.

All terms in the glossary