. Darwin was born during the
Napoleonic Wars and grew up in their aftermath, a conservative time when
Tory-dominated government closely associated with the established
Anglican Church of England repressed
Radicalism, but when family memories recalled the 18th-century
Enlightenment and a multitude of
Non-conformist churches held differing interpretations of Christianity. His
Whig-supporting extended
family of Darwins and Wedgwoods was strongly
Unitarian, though one of his grandfathers,
Erasmus Darwin, was a
freethinker, and his father was quietly a freethinker but as a physician avoided any social conflict with his wealthy Anglican patrons. While Darwin's parents were open enough to changing social pressures to have Charles
baptised in the Church of England, his pious mother took the children to the Unitarian chapel. After her death when he was only eight he became a
boarder at
Shrewsbury School, an Anglican
public school. Under pressure in the fourth year, Darwin worked hard at his studies, getting tuition in theology by Henslow. Darwin became particularly interested in the Revd
William Paley's
Evidences of Christianity and
Principles of Moral and Political Philosophy, which were set texts. The latter was becoming outdated. It opposed arguments for increased democracy, but saw no divine right of rule for the sovereign or the state, only "expediency". Government could be opposed if grievances outweighed the danger and expense to society. The judgement was "Every man for himself". These ideas had suited the conditions of reasonable rule prevailing when the text was published in 1785, but in 1830 they were dangerous ideas at a time when the French king was deposed by middle class republicans and given refuge in England by the
Tory government, and resulting radical street protests demanded
suffrage,
equality and
freedom of religion. Paley's text even supported abolition of the
Thirty-nine Articles of the Anglican faith which every student at Cambridge (and
Oxford University) was required to sign. Henslow insisted that "he should be grieved if a single word of the Thirty-nine Articles were altered" and emphasised the need to respect authority. Darwin later wrote that he was convinced that he "could have written out the whole of the
Evidences with perfect correctness, but not of course in the clear language of Paley. The logic of this book and as I may add of his
Natural Theology gave me as much delight as did
Euclid." After doing particularly well in his final exam questions on Paleys' books, Darwin read Paley's
Natural Theology which set out to refute
David Hume's argument that the
teleological argument for "design" by a Creator was merely a human projection onto the forces of nature. Paley saw a rational proof of God's existence in the complexity and perfect
adaptation to needs of living beings exquisitely fitted to their places in a happy world, while attacking the evolutionary ideas of
Erasmus Darwin as coinciding with atheistic schemes and lacking evidence. Paley's benevolent God acted in nature through uniform and universal laws, not arbitrary miracles or changes of laws, and this use of secondary laws provided a
theodicy explaining the
problem of evil by separating nature from direct divine action, drawing directly on the ideas of
Thomas Malthus. For Paley, a
Malthusian "system of natural hostilities" of animals living on prey was strictly connected to the surplus of births keeping the world appropriately stocked as circumstances changed, and poverty showed that the world was in a "state of probation… calculated for the production, exercise, and improvement of moral qualities, with a view to a future state", even where such divine purpose was not obvious. This convinced Charles and encouraged his interest in science. He later wrote "I do not think I hardly ever admired a book more than Paley's
Natural Theology: I could almost formerly have said it by heart." He read
John Herschel's new
Preliminary Discourse on the Study of Natural Philosophy, learning that nature was governed by laws, and the highest aim of
natural philosophy was to understand them through an orderly process of
induction, balancing observation and theorising. This exemplified the natural theology that Darwin had learnt in previous years. He also read
Alexander von Humboldt's
Personal Narrative, and the two books were immensely influential, stirring up in him "a burning zeal to add even the most humble contribution to the noble structure of Natural Science." then went with him for two weeks surveying
strata in Wales. He returned to find that his arrangements had fallen through, but was given the opportunity to join the
Beagle survey expedition as a gentleman naturalist and companion to Captain
Robert FitzRoy. Before they left England FitzRoy gave Darwin a copy of the first volume of
Charles Lyell's
Principles of Geology, the subject which would be his primary work. Darwin was questioning from the outset, and in his first zoology notes he wondered why deep-ocean
plankton had been created with so much beauty for little purpose as no one could see them. He saw landforms as supporting Lyell's
Uniformitarianism which explained features as the outcome of a gradual process over huge periods of time, and quickly showed a gift for theorising about the geology he was examining. He concluded that the land had indeed risen, and referred to loose rock deposits as "part of the long disputed Diluvium". Around 1825 both Lyell and Sedgwick had supported
William Buckland's
Catastrophism which postulated
diluvialism to reconcile findings with the Biblical account of
Noah's Ark, but by 1830 evidence had shown them that the "
diluvium" had come from a series of local processes. They still distinguished between diluvial and alluvial deposits, but Sedgwick no longer thought these deposits were connected with Noah's flood by the time he taught Darwin, though the debate continued. Darwin's notes show him increasingly discounting "debacles" to account for such formations. It was only later that
glaciation was accepted as the source of these deposits. Lyell's second volume explained extinctions as a "succession of deaths" due to changed circumstances with new species then being created, but Darwin found giant fossils of extinct mammals with no geological signs of a "diluvial debacle" or environmental change, and so rejected Lyell's explanation in favour of
Giovanni Battista Brocchi's idea that species had somehow aged and died out. On the
Galápagos Islands he remained convinced by Lyell's idea of species spreading from "centres of creation", and assumed that species had spread from the mainland rather than originating on these geologically recent volcanic islands. He failed to note locations of most of his finds, but fortunately recorded
mockingbirds and plant life with more care. In Australia, reflecting on the
marsupial kangaroos and
potoroos, he thought them so strange that an unbeliever "might exclaim 'Surely two distinct Creators must have been [at] work; their object however has been the same & certainly the end in each case is complete'", yet an
antlion he was watching was very similar to its European counterpart. "Now what would the Disbeliever say to this? Would any two workmen ever hit on so beautiful, so simple & yet so artificial a contrivance? It cannot be thought so. – The one hand has surely worked throughout the universe. A Geologist perhaps would suggest, that the periods of Creation have been distinct & remote the one from the other; that the Creator rested in his labor." Darwin was struggling with inconsistencies in these ideas. As they neared the end of the voyage his thoughts about the mockingbirds shook his confidence that species were fixed and that variation was limited. Missionaries were being accused of causing racial tension and profiteering, and after the
Beagle set to sea on 18 June FitzRoy wrote an open letter to the
evangelical South African Christian Recorder on the
Moral State of Tahiti incorporating extracts from both his and Darwin's diaries to defend the reputation of missionaries. This was given to a passing ship which took it to Cape Town to become FitzRoy's (and Darwin's) first published work. FitzRoy too had seen geological features as supporting Lyell's timescale, and on his return to England extracts from his diary stressing the immense age of the
Patagonian
raised beaches were read to the
Royal Geographical Society, but he married a very religious lady and in his
Narrative of the voyage added a supplement regretting having "remarked to a friend" that these vast plains "could never have been effected by a forty days' flood", remarks he ascribed to his own "turn of mind and ignorance of scripture" during the voyage. ==Darwin's changing view on faith==