El origen del hombre
Writing to Darwin in 1871, Matthew enclosed an article he had written for "The Scotsman" and, as well as wishing that he had time to write a critique of "The Descent of Man, and Selection in Relation to Sex", expressed the belief that there is evidence of design and benevolence in nature, and that beauty cannot be accounted for by natural selection. Such a belief is mainstream natural theology, and reveals how far Matthew was from Darwin in realising the potential of evolutionary explanations: for him as well as others, man was the sticking-point.