Bertrand Russell on The Kalam cosmological argument
Russell rejected the premise that the universe requires a cause, arguing it may simply exist as a brute fact.
Russell did not engage with Craig's specific formulation of the Kalam (which was published in 1979, nine years after Russell's death), but he directly addressed its core claim in his 1948 BBC debate with Frederick Copleston. When Copleston argued that the universe must have a cause, Russell replied that the universe might simply exist without explanation — it is 'just there, and that's all.'
Russell's position was that the demand for a cause of the universe commits a fallacy of composition: just because every event within the universe has a cause, it does not follow that the universe as a whole has a cause. Every human has a mother, but humanity as a whole does not have a mother. The properties of parts do not necessarily transfer to the whole.
He was also sceptical of the inference from 'the universe has a cause' to 'that cause is God.' Even granting a first cause, Russell saw no reason to ascribe it intelligence, personality, or benevolence. The jump from 'something caused the universe' to 'the God of Christianity caused the universe' was, in his view, entirely unsupported by the argument's logic.
“I should say that the universe is just there, and that's all.”
“The whole concept of cause is one we derive from our observation of particular things; I see no reason whatsoever to suppose that the total has any cause whatsoever.”