Professor John Edensor Littlewood of Cambridge University had introduced the law, which was included in his book, namely, A Mathematician's Miscellany, a 1986 anthology of his work.
It aims to discredit one aspect of alleged supernatural perception. Also, it is related to the more basic law of genuinely large numbers. The Law of Miracles states that with a big enough sample size, anything absurd (about a single sample probability model) can probably happen.