{"id":25201,"date":"2025-02-27T09:29:43","date_gmt":"2025-02-27T08:29:43","guid":{"rendered":"https:\/\/educationalevidence.com\/?p=25201"},"modified":"2025-02-28T09:09:25","modified_gmt":"2025-02-28T08:09:25","slug":"lou-o-la-gallina-del-darwinisme","status":"publish","type":"post","link":"https:\/\/educationalevidence.com\/ca\/lou-o-la-gallina-del-darwinisme\/","title":{"rendered":"L\u2019ou o la gallina del Darwinisme"},"content":{"rendered":"<h1>L\u2019ou o la gallina del Darwinisme<\/h1>\n<figure id=\"attachment_25339\" aria-describedby=\"caption-attachment-25339\" style=\"width: 863px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-25339\" src=\"https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin.jpg\" alt=\"\" width=\"863\" height=\"508\" srcset=\"https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin.jpg 863w, https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin-300x177.jpg 300w, https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin-768x452.jpg 768w, https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin-561x330.jpg 561w, https:\/\/educationalevidence.com\/wp-content\/uploads\/2025\/02\/cover-darwin-270x159.jpg 270w\" sizes=\"(max-width: 863px) 100vw, 863px\" \/><figcaption id=\"caption-attachment-25339\" class=\"wp-caption-text\">Un exemplar de la primera edici\u00f3 de <em>L&#8217;origen de les esp\u00e8cies<\/em>.\/ <a href=\"https:\/\/es.wikipedia.org\/wiki\/Charles_Darwin#\/media\/Archivo:Origin_of_Species.jpg\" target=\"_blank\" rel=\"noopener\">Wikimedia<\/a><\/figcaption><\/figure>\n<p><a style=\"display: inline-block;\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/deed.ca\" target=\"_blank\" rel=\"license noopener noreferrer\">Llic\u00e8ncia Creative Commons<img decoding=\"async\" style=\"height: 22px!important; margin-left: 3px; vertical-align: text-bottom;\" src=\"https:\/\/mirrors.creativecommons.org\/presskit\/icons\/cc.svg?ref=chooser-v1\" \/><img decoding=\"async\" style=\"height: 22px!important; margin-left: 3px; vertical-align: text-bottom;\" src=\"https:\/\/mirrors.creativecommons.org\/presskit\/icons\/by.svg?ref=chooser-v1\" \/><img decoding=\"async\" style=\"height: 22px!important; margin-left: 3px; vertical-align: text-bottom;\" src=\"https:\/\/mirrors.creativecommons.org\/presskit\/icons\/nc.svg?ref=chooser-v1\" \/><img decoding=\"async\" style=\"height: 22px!important; margin-left: 3px; vertical-align: text-bottom;\" src=\"https:\/\/mirrors.creativecommons.org\/presskit\/icons\/nd.svg?ref=chooser-v1\" \/><\/a><\/p>\n<p><a href=\"https:\/\/twitter.com\/DAVIDRABADA\"><strong><img decoding=\"async\" class=\"alignleft wp-image-14927\" src=\"https:\/\/educationalevidence.com\/wp-content\/uploads\/2024\/04\/David-Rabada-1-150x150.jpg\" alt=\"\" width=\"70\" height=\"70\" \/><\/strong><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/twitter.com\/DAVIDRABADA\"><strong>David Rabad\u00e0<\/strong><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Els nostres avantpassats no van sobreviure per lluitar a l\u2019Stallone sin\u00f3 per tot el contrari. La susdita llei del m\u00e9s fort resulta avui dia una presumpci\u00f3 massa militar aplicada en evoluci\u00f3. Barallar-se implica riscos, lesions i p\u00e8rdues. Per aix\u00f2, i en el nostre planeta, son moltes les esp\u00e8cies que eludeixen la lluita per raons \u00f2bvies. Els nostres ancestres, com a part de la biologia terrestre, tamb\u00e9 van reduir la seva agressivitat per a sobreviure m\u00e9s. L&#8217;\u00e8xit evolutiu dels nostres parents no es va fonamentar ni en Mazinger Z ni en Rambo. Les seves habilitats, i per a brindar-nos el seu patrimoni gen\u00e8tic, van ser altres. El motor evolutiu real de l&#8217;evoluci\u00f3 no va ser la for\u00e7a bruta i la lluita entre esp\u00e8cies que alguns darwinistes socials preconitzen, sin\u00f3 una altra capacitat, la seva taxa de reproducci\u00f3. Per a analitzar aquest fet cal fer un rec\u00e9s en les ribes de la <strong>Selecci\u00f3 Natural<\/strong> i en el seu punt m\u00e9s feble, en el seu error, el qui sobreviu.<\/p>\n<p><strong>Darwin<\/strong> va ser pioner al trencar amb els prejudicis creacionistes del moment. La seva idea de la Selecci\u00f3 Natural va irrompre en una societat victoriana creient en el fixisme aristot\u00e8lic. En aquells dies la visi\u00f3 del m\u00f3n era que tot havia estat bastant igual durant l&#8217;esdevenir dels temps. No \u00e9s que no hi hagu\u00e9s dubtes i proves de canvis dr\u00e0stics, sin\u00f3 que aquests nom\u00e9s es veien sota les hecatombes b\u00edbliques. El diluvi universal o els c\u00e0stigs divins sustentaven les explicacions de llavors. Darwin, i davant l&#8217;evoluci\u00f3 biol\u00f2gica i els canvis d&#8217;esp\u00e8cies, va demostrar una explicaci\u00f3 de les moltes que vindrien. Aix\u00ed l\u2019any 1859, i no sense pensar-s\u2019ho molt, va publicar el seu<strong> <em>Origen de les Esp\u00e8cies<\/em><\/strong> i la seva Teoria de la Selecci\u00f3 Natural.<\/p>\n<p>L\u2019any 1930, i amb una Selecci\u00f3 Natural enriquida amb la gen\u00e8tica mendeliana, la paleontologia i la sistem\u00e0tica, va sorgir una teoria m\u00e9s ampliada, el <strong>Neodarwinisme<\/strong>. En aquest, i a part de la Selecci\u00f3 Natural, es descrivien m\u00e9s mecanismes per a explicar els canvis d&#8217;esp\u00e8cies i varietats. M\u00e9s tard, i a mitjans del segle XX, altres disciplines s\u2019hi van afegir per a construir l\u2019actual Teoria Sint\u00e8tica de l&#8217;Evoluci\u00f3. Aquesta va aportar m\u00e9s i millors explicacions per a l&#8217;evoluci\u00f3 de noves esp\u00e8cies. En tot aix\u00f2, i cal insistir, Darwin nom\u00e9s va aportar el primer mecanisme, la Selecci\u00f3 Natural, mentre que la resta va venir despr\u00e9s. Multitud de mecanismes demostrats avui dia expliquen l&#8217;evoluci\u00f3 dels organismes. Tots ells, Selecci\u00f3 Natural inclosa, van posar en la palestra que <strong>l&#8217;evoluci\u00f3 no sempre va ser gradual entre les esp\u00e8cies<\/strong>, sin\u00f3 que de vegades han sobrevingut passos r\u00e0pids durant l&#8217;evoluci\u00f3. En aix\u00f2 ingents proves hi ha en l&#8217;evoluci\u00f3 humana. Per\u00f2 tornem a la Selecci\u00f3 Natural i al seu error de base.<\/p>\n<p>El proc\u00e9s de la Selecci\u00f3 Natural es troba fonamentat en tres fets que va observar Darwin. El primer, que les esp\u00e8cies fan ingents esfor\u00e7os per a reproduir-se amb milers de llavors i espermatozoides. El segon, que la variabilitat dins d&#8217;elles \u00e9s tan \u00e0mplia que permet que uns passin la prova del temps i altres no. I el tercer, que molt pocs dels nascuts arriben a reproduir-se. D&#8217;aix\u00f2 Darwin en va concloure que passat el temps, sol unes poques varietats, no totes, aconseguien perpetuar-se en l&#8217;evoluci\u00f3, \u00e9s a dir, reproduir-se com si haguessin estat seleccionades per una rifa sense una m\u00e0 directora. Per a Darwin qui sobrevivia esdevenia el m\u00e9s apte, encara que en aix\u00f2 pesava un pensament circular que el pare de la Selecci\u00f3 Natural no va resoldre de manera satisfact\u00f2ria. Aquest va ser l&#8217;error i punt feble de la Selecci\u00f3 Natural, que no el de la <strong>Teoria Sint\u00e8tica de l&#8217;Evoluci\u00f3<\/strong>. Si el m\u00e9s apte sobreviu i qui sobreviu \u00e9s el m\u00e9s apte, ens trobem davant un peix que es mossega la cua, la qual cosa en filosofia s\u2019anomena una tautologia. Ve a ser el mateix que les eternes preguntes de qui va ser abans, \u00bfl&#8217;ou o la gallina? O, \u00bfqu\u00e8 hi ha m\u00e9s enll\u00e0 del pol nord? El sud, \u00bfi despr\u00e9s del sud? Doncs el nord.<\/p>\n<p>Totes les anteriors preguntes pateixen de ser q\u00fcestions mal plantejades. Per a resoldre aquests pensaments circulars nom\u00e9s hi ha un m\u00e8tode, definir els dos nodes, veure qu\u00e8 ocorre i canviar la pregunta. Nord i sud son la mateixa Terra, on la pregunta \u00f2ptima seria quina geometria t\u00e9 el planeta perqu\u00e8 des del nord s&#8217;arribi de nou al sud; ou i gallina son tamb\u00e9 la mateixa esp\u00e8cie on la q\u00fcesti\u00f3 hauria de ser quin organisme va ser el primer que es va reproduir per ous; i finalment, sobreviure i apte equivalen al mateix on la pregunta hauria de ser per qu\u00e8 alguns organismes perduren i altres no. I la resposta \u00e9s que qui perdura no \u00e9s sempre el millor adaptat, ni el m\u00e9s lluitador, ni el m\u00e9s agressiu, sin\u00f3 simplement qui millor es reprodueix. A major taxa reproductiva, major possibilitat de perdurar. Per tant no \u00e9s assumpte d&#8217;apte o no apte sin\u00f3 de qui aconsegueix, per adaptaci\u00f3 o no, romandre m\u00e9s temps en un ecosistema. En fi, qui millor es reprodueix m\u00e9s garanties t\u00e9 de continu\u00eftat. Tot aix\u00f2 explica que molts trets de la nostra evoluci\u00f3 potser no van ostentar cap adaptaci\u00f3 per\u00f2 van formar part de <strong>grups taxon\u00f2mics que es van reproduir millor<\/strong>. Els \u00f2rgans vestigials son prova d&#8217;aix\u00f2 per\u00f2 tamb\u00e9 el bipedisme, l\u2019encefalitzaci\u00f3 i el pensament abstracte es troben en part en aquestes categories.<\/p>\n<p>Tornant al Darwinisme, i als prejudicis que el van envoltar, cal preguntar-se per qu\u00e8 va trigar tant de temps a acceptar-se la Selecci\u00f3 Natural i les seves posteriors ampliacions. En aix\u00f2 es troben dues raons. La primera, l&#8217;her\u00e8ncia cultural del fixisme aristot\u00e8lic durant tota la nostra hist\u00f2ria occidental. I la segona, la nostra her\u00e8ncia biol\u00f2gica on els primats som poc inclinats als canvis pel nostre desig de seguretat. De fet els humans preferim el segur heretat al nou q\u00fcestionat. Exemples d&#8217;aix\u00f2 els hem sofert durant tota la hist\u00f2ria. Cop\u00e8rnic va defensar amb dades el seu heliocentrisme en el XVI per\u00f2 no va ser t\u00edmidament acceptat fins al XVII; Bruno va proposar un univers infinit tamb\u00e9 en el XVI per\u00f2 no va ser fins al XX que es va discutir amb profunditat; i finalment el Darwinisme es va presentar en el XIX per\u00f2 avui dia encara alguns el neguen. <strong>Els humans som emocionalment conservadors<\/strong> sota el desig de la seguretat.<\/p>\n<p>Arribats a aquest punt podem tornar a l&#8217;evoluci\u00f3 humana i adonar-nos que aquesta es troba farcida de salts, amb o sense adaptacions, que defineixen bastant b\u00e9 una evoluci\u00f3 en mosaic. Tres d&#8217;ells son crucials i serveixen d\u2019estructura per a aquest llibre. El primer va ser el <strong>bipedisme<\/strong> fa m\u00e9s de tres milions d&#8217;anys, el segon va ser l&#8217;<strong>augment del nostre enc\u00e8fal<\/strong> abans dels dos milions d&#8217;anys, i el tercer va ser l&#8217;adquisici\u00f3 d&#8217;un <strong>pensament sofisticat<\/strong> al voltant de fa mig mili\u00f3 d&#8217;anys. A les tres fases anteriors cal afegir l&#8217;extensi\u00f3 d&#8217;un polze oposable, l&#8217;escur\u00e7ament de bra\u00e7os a canvi de l&#8217;allargament de cames, la fabricaci\u00f3 de pedres tallants, la reducci\u00f3 del dimorfisme sexual, la desaparici\u00f3 del zel en les femelles, l&#8217;expansi\u00f3 de les gl\u00e0ndules sudor\u00edpares, la p\u00e8rdua del p\u00e8l corporal, el descens de l&#8217;agressivitat instintiva i la parla articulada entre moltes altres adquisicions.<\/p>\n<hr \/>\n<p>Font:\u00a0<strong>educational EVIDENCE<\/strong><\/p>\n<p>Drets:\u00a0<strong>Creative Commons<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Els nostres avantpassats no van sobreviure per lluitar a l\u2019Stallone sin\u00f3 per tot el contrari. La susdita llei del m\u00e9s fort resulta avui dia una presumpci\u00f3 massa militar aplicada en evoluci\u00f3. Barallar-se implica riscos, lesions i p\u00e8rdues. Per aix\u00f2, i en el nostre planeta, son moltes les esp\u00e8cies que eludeixen la lluita per raons \u00f2bvies.<\/p>\n","protected":false},"author":4,"featured_media":25339,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_FSMCFIC_featured_image_caption":"","_FSMCFIC_featured_image_nocaption":"1","_FSMCFIC_featured_image_hide":"","footnotes":""},"categories":[219],"tags":[2610,2608,2607,2609],"class_list":["post-25201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-ca","tag-darwin-ca","tag-neodarwinisme","tag-seleccio-natural","tag-teoria-sintetica-de-levolucio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L\u2019ou o la gallina del Darwinisme - Educational Evidence<\/title>\n<meta name=\"description\" content=\"Els nostres avantpassats no van sobreviure per lluitar a l\u2019Stallone sin\u00f3 per tot el contrari. 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