The cosmological argument, often called the “First Cause” argument, is one of the oldest and most intuitive arguments for the existence of God. It claims that because everything has a cause, there must ultimately be a first cause that itself is uncaused – and that this cause is God. On the surface, it feels persuasive. But once we dig a little deeper, the simplicity turns into a tangle of assumptions, contradictions, and leaps of logic.
The Basic Form of the Argument
- Everything that exists has a cause.
- Nothing can cause itself.
- There cannot be an infinite regress of causes.
- Therefore, there must be a first uncaused cause.
- This uncaused cause is God.
Famous Defenders
Aristotle: He argued for a “prime mover,” an unmoved mover that set everything into motion. This was not originally the God of any religion, but rather a metaphysical necessity.
Thomas Aquinas: In his Five Ways, Aquinas took Aristotle’s idea and explicitly linked it to the Christian God, claiming there must be a first cause of all causes, and that this first cause is God.
William Lane Craig: A modern defender of the so-called “Kalam Cosmological Argument,” Craig argues that everything that begins to exist has a cause, the universe began to exist, and therefore the universe must have a cause outside of itself – namely, God.
Famous Critics
David Hume: He questioned whether causality itself can be applied to the universe as a whole. Hume argued that our concept of cause-and-effect is derived from experience within the universe, and we cannot assume it applies beyond it.
Immanuel Kant: Kant rejected cosmological arguments on the grounds that they rely on the ontological argument. He also doubted whether human reason can validly extend concepts like causality outside of space and time.
Bertrand Russell: Famously stated that “the universe is just there, and that’s all.” He argued that if God can exist without a cause, so too can the universe.
The Immediate Problem: Special Pleading
The argument begins by saying “everything has a cause,” but then immediately exempts God. Why should God alone be uncaused? If it is possible for something to exist without a cause, then why not the universe itself? The cosmological argument answers one mystery (why the universe exists) by introducing a bigger one (why God exists).
Infinite Regress: Is It Really Impossible?
One of the premises is that an infinite regress of causes is impossible. But why? Mathematicians handle actual infinities all the time. Physics doesn’t rule out an eternal universe or cycles of expansion and contraction. The claim that an infinite regress is logically impossible is not demonstrated – it’s simply asserted.
Defining “Cause” Beyond the Universe
Causation, as we understand it, applies within the universe – within space, time, and matter. But the cosmological argument projects this rule beyond the universe, to the origin of space and time themselves. We don’t actually know if the same rules apply outside the cosmos. Asking “what caused the universe” may be like asking “what’s north of the North Pole” – a category mistake.
The Leap to God
Even if you accept the need for a first cause, why identify it with God? Why not say the universe itself is brute fact – simply existing without explanation? Or perhaps quantum processes, which defy classical notions of cause and effect, play the role. The argument smuggles in God at the last step without justification. Nothing about the premises requires the first cause to be conscious, omnipotent, omniscient, or personal.
Modern Cosmology
Modern science complicates the argument further. Quantum mechanics reveals events (like particle decay) that seem to happen without specific causes. The Big Bang theory doesn’t describe a cause for the universe but rather a boundary to where our physical models apply. To leap from “we don’t know” to “therefore God” is a textbook example of a God-of-the-gaps argument.
Conclusion
The cosmological argument has an intuitive appeal, because humans naturally look for causes. But intuition is not evidence. On closer examination, it either ends in special pleading (everything has a cause except God), in question-begging (assuming infinite regress is impossible), or in unjustified leaps (the first cause must be God). At best, it points to mystery. At worst, it replaces one unexplained fact (the universe) with another (God), while pretending the problem is solved. If there is a first cause, we have no reason yet to think it looks anything like the God of religion.