Introducción de la teoría de evolución de Darwin

Biography

Early life and education

See also: Charles Darwin's education and Darwin-Wedgwood family

Charles Robert Darwin was born in Shrewsbury, Shropshire, England, on 12 February 1809 at his family home, The Mount.[19] He was the fifth of six children of wealthy society doctor and financier Robert Darwin, and Susannah Darwin (née Wedgwood). He was the grandson of two prominent abolitionists: Erasmus Darwin on his father's side, and of Josiah Wedgwood on his mother's side.

Three quarter length portrait of seated boy smiling and looking at the viewer. He has straight mid brown hair, and wears dark clothes with a large frilly white collar. In his lap he holds a pot of flowering plants

The seven-year-old Charles Darwin in 1816.

Both families were largely Unitarian, though the Wedgwoods were adopting Anglicanism. Robert Darwin, himself quietly a freethinker, had baby Charles baptised in November 1809 in the Anglican St Chad's Church, Shrewsbury, but Charles and his siblings attended the Unitarian chapel with their mother. The eight-year-old Charles already had a taste for natural history and collecting when he joined the day school run by its preacher in 1817. That July, his mother died. From September 1818 he joined his older brother Erasmus attending the nearby Anglican Shrewsbury School as a boarder.[20]

Darwin spent the summer of 1825 as an apprentice doctor, helping his father treat the poor of Shropshire, before going to the University of Edinburgh Medical School, at the time the best medical school in the UK, with his brother Erasmus in October 1825. He found lectures dull and surgery distressing, so neglected his studies. He learned taxidermy from John Edmonstone, a freed black slave who had accompanied Charles Waterton in the South American rainforest, and often sat with this "very pleasant and intelligent man".[21]

In Darwin's second year he joined the Plinian Society, a student natural history group whose debates strayed into radical materialism. He assisted Robert Edmond Grant's investigations of the anatomy and life cycle of marine invertebrates in the Firth of Forth, and on 27 March 1827 presented at the Plinian his own discovery that black spores found in oyster shells were the eggs of a skate leech. One day, Grant praised Lamarck's evolutionary ideas. Darwin was astonished by Grant's audacity, but had recently read similar ideas in his grandfather Erasmus' journals.[22] Darwin was rather bored by Robert Jameson's natural history course which covered geology including the debate between Neptunism and Plutonism. He learned classification of plants, and assisted with work on the collections of the University Museum, one of the largest museums in Europe at the time.[23]

This neglect of medical studies annoyed his father, who shrewdly sent him to Christ's College, Cambridge, for a Bachelor of Arts degree as the first step towards becoming an Anglican parson. As Darwin was unqualified for the Tripos, he joined the ordinary degree course in January 1828.[24] He preferred riding and shooting to studying. His cousin William Darwin Fox introduced him to the popular craze for beetle collecting; Darwin pursued this zealously, getting some of his finds published in Stevens' Illustrations of British entomology. He became a close friend and follower of botany professor John Stevens Henslow and met other leading naturalists who saw scientific work as religious natural theology, becoming known to these dons as "the man who walks with Henslow". When his own exams drew near, Darwin focused on his studies and was delighted by the language and logic of William Paley's Evidences of Christianity.[25] In his final examination in January 1831 Darwin did well, coming tenth out of 178 candidates for the ordinary degree.[26]

Darwin had to stay at Cambridge until June. He studied Paley's Natural Theology or Evidences of the Existence and Attributes of the Deity, which made an argument for divine design in nature, explaining adaptation as God acting through laws of nature.[27] He read John Herschel's new book, which described the highest aim of natural philosophy as understanding such laws through inductive reasoning based on observation, and Alexander von Humboldt's Personal Narrative of scientific travels. Inspired with "a burning zeal" to contribute, Darwin planned to visit Tenerife with some classmates after graduation to study natural history in the tropics. In preparation, he joined Adam Sedgwick's geology course, then travelled with him in the summer for a fortnight, in order to map strata in Wales.[28]

Voyage of the Beagle

For more details on this topic, see Second voyage of HMS Beagle.

Route from Plymouth, England, south to Cape Verde then southwest across the Atlantic to Bahia, Brazil, south to Rio de Janeiro, Montevideo, the Falkland Islands, round the tip of South America then north to Valparaiso and Callao. Northwest to the Galapagos Islands before sailing west across the Pacific to New Zealand, Sydney, Hobart in Tasmania, and King George's Sound in Western Australia. Northwest to the Keeling Islands, southwest to Mauritius and Cape Town, then northwest to Bahia and northeast back to Plymouth.

The voyage of the Beagle, 1831–1836

After a week with student friends at Barmouth, Darwin returned home on 29 August to find a letter from Henslow proposing him as a suitable (if unfinished) gentleman naturalist for a self-funded supernumerary place on HMS Beagle with captain Robert FitzRoy, more as a companion than a mere collector. The ship was to leave in four weeks on an expedition to chart the coastline of South America.[29] Robert Darwin objected to his son's planned two-year voyage, regarding it as a waste of time, but was persuaded by his brother-in-law, Josiah Wedgwood, to agree to (and fund) his son's participation.[30]

After delays, the voyage began on 27 December 1831; it lasted almost five years. As FitzRoy had intended, Darwin spent most of that time on land investigating geology and making natural history collections, while the Beagle surveyed and charted coasts.[7][31] He kept careful notes of his observations and theoretical speculations, and at intervals during the voyage his specimens were sent to Cambridge together with letters including a copy of his journal for his family.[32] He had some expertise in geology, beetle collecting and dissecting marine invertebrates, but in all other areas was a novice and ably collected specimens for expert appraisal.[33] Despite suffering badly from seasickness, Darwin wrote copious notes while on board the ship. Most of his zoology

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