William Lane Craig and Alex Malpass debate the Kalam cosmological argument: everything that begins to exist has a cause; the universe began to exist; therefore, the universe has a cause.

Hosted by John Nelson, the discussion explores whether causation applies to the universe, whether an actual infinite can exist, Hilbert’s Hotel, successive addition, the Grim Reaper paradox, and whether the universe’s cause must be timeless, spaceless, powerful and personal. Craig defends the argument’s metaphysical force and the plausibility of a divine creator, while Malpass challenges its premises with philosophical logic, set theory, and alternative accounts of time and causation. A rigorous and good-humoured exchange on one of philosophy of religion’s most famous arguments.

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Released on 8 May 2026