designed and constructed by God, Paley holds, is as natural as it is correct." Natural theology strongly influenced British science, with the expectation as expressed by Adam Sedgwick in 1831 that truths revealed by science could not conflict with the moral truths of religion. These natural philosophers saw God as the first cause, and sought secondary causes to explain design in nature: the leading figure Sir John Herschel wrote in 1836 that by analogy with other intermediate causes "the origination of fresh species, could it ever come under our cognizance, would be found to be a natural in contradistinction to a miraculous process". As a theology student, Charles Darwin found Paley's arguments compelling. However, he later developed his theory of evolution in his 1859 book On the Origin of Species, which offers an alternate explanation of biological order. In his autobiography, Darwin wrote that "The old argument of design in nature, as given by Paley, which formerly seemed to me so conclusive, fails, now that the law of natural selection has been discovered". Darwin struggled with the problem of evil and of suffering in nature, but remained inclined to believe that nature depended upon "designed laws" and commended Asa Gray's statement about "Darwin's great service to Natural Science in bringing back to it Teleology: so that, instead of Morphology versus Teleology, we shall have Morphology wedded to Teleology." Darwin owned he was "bewildered" on the subject, but was "inclined to look at everything as resulting from designed laws, with the details, whether good or bad, left to the working out of what we may call chance:" Recent proponents Probabilistic arguments In 1928 and 1930, F. R. Tennant published his Philosophical Theology, which was a "bold endeavour to combine scientific and theological thinking". He proposed a version of the teleological argument based on the accumulation of the probabilities of each individual biological adaptation. "Tennant concedes that naturalistic accounts such as evolutionary theory may explain each of the individual adaptations he cites, but he insists that in this case the whole exceeds the sum of its parts: naturalism can explain each adaptation but not their totality." The Routledge Encyclopedia of Philosophy notes that "Critics have insisted on focusing on the cogency of each piece of theistic evidence – reminding us that, in the end, ten leaky buckets hold no more water than one." Also, "Some critics, such as John Hick and D.H.