The Contingency Argument
Why does anything exist at all, rather than nothing?
Why it matters
Even if the universe were past-eternal, a deeper question remains: why does it exist? The contingency argument targets this more fundamental issue. Leibniz's version, refined by modern philosophers, argues that contingent things require a necessary explanation grounded in a being that exists of its own nature.
The main case
Leibnizian form: (1) Everything that exists has an explanation of its existence, either in the necessity of its own nature or in an external cause. (2) If the universe has an explanation of its existence, that explanation is God. (3) The universe exists. (4) Therefore, the universe has an explanation of its existence (1,3). (5) Therefore, that explanation is God (2,4). The key premise is the principle of sufficient reason: there are no brute facts at the level of metaphysics. A necessarily existent being terminates the regress because its non-existence would be impossible.
Claim · Evidence · Objection · Response
1.The universe is contingent, not necessary.
Majority viewEvidence
- The universe could have been different (different constants, different initial conditions).
- It could have failed to exist at all without logical contradiction.
- No physical theory identifies the universe as its own ground.
Strongest objection
"Perhaps the universe is necessary, as Spinoza held."
Response
Spinoza's pantheism is internally coherent but extraordinarily costly: it requires that every detail of history is necessary and could not have been otherwise. Most find the contingency of particulars (the existence of this tree, this person) more obvious than any thesis that eliminates it.
- Reasonable Faith — William Lane Craig (2008 (3rd ed.))scholarlyFind on Amazon
- The Existence of God (ch. 8, Fine-Tuning) — Richard Swinburne (2004)scholarlyFind on Amazon
2.Only a necessary being terminates the regress.
DebatedEvidence
- Any chain of contingent causes, however long, still requires explanation as a whole.
- A necessarily existent being (whose non-existence is impossible) is the only stopping point that does not itself demand further explanation.
- Classical theism identifies this being with God: one, simple, necessary, personal.
Strongest objection
"Why couldn't the universe itself be the necessary being?"
Response
The universe's contingency is evident in its alterability, its physics, and its dependence on initial conditions. Necessary beings have no alternative states and no parts. The universe has both.
- Reasonable Faith — William Lane Craig (2008 (3rd ed.))scholarlyFind on Amazon
- The Existence of God (ch. 8, Fine-Tuning) — Richard Swinburne (2004)scholarlyFind on Amazon
- Scaling the Secular City — J.P. Moreland (1987)scholarlyFind on Amazon
What scholars debate
Contemporary defenders include Alexander Pruss, Robert Koons, and Joshua Rasmussen. Critics (Oppy) argue the principle of sufficient reason overreaches. The debate often reduces to whether brute facts are metaphysically tolerable.
Reflection
- 1.Is the universe the kind of thing that could have failed to exist?
- 2.Do you accept the principle of sufficient reason in everyday life?
- 3.What would it mean for a being to exist "of its own nature"?
Key sources
- Reasonable Faith — William Lane Craig (2008 (3rd ed.))scholarlyFind on Amazon
- The Existence of God (ch. 8, Fine-Tuning) — Richard Swinburne (2004)scholarlyFind on Amazon
- Scaling the Secular City — J.P. Moreland (1987)scholarlyFind on Amazon
Featured thinkers
A leading contemporary defender of the Kalam cosmological argument and the historicity of the resurrection.
A leading philosopher of religion who has applied Bayesian probability theory to arguments for God's existence, the incarnation, and the resurrection.
Analytic philosopher who has written on consciousness, substance dualism, naturalism, and Christian epistemology.
Pass it on
Share this lesson
One honest argument can change a conversation. Send it to a friend, a skeptic, or your small group.
Want a hi-res image card instead? Build a shareable evidence card sized for X or Instagram Stories.