Orthogenesis, orthogenetic evolution or autogenesis, is the hypothesis that life has an innate tendency to move, in a unilinear fashion, to ever greater perfection. The hypothesis is based on Essentialism, finalism and cosmic teleology and proposes an intrinsic drive which slowly transforms species. George Gaylord Simpson (1953) in an attack on orthogenesis called this mechanism "the mysterious inner force". Proponents of orthogenesis rejected the theory of natural selection as the organising mechanism in evolution, and theories of speciation for a rectilinear model of guided evolution acting on discrete species with "essences". The term orthogenesis was popularised by Theodor Eimer, though many of the ideas are much older (Bateson 1909). A hypothesis (assumption in ancient Greek) is a proposed explanation for a phenomenon. ... Life is a multi-faceted concept. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Teleology is the supposition that there is design, purpose, directive principle, or finality in the works and processes of nature, and the philosophical study of that purpose. ... In biology, a species is, loosely speaking, a group of related organisms that share a more or less distinctive form and are capable of interbreeding. ... George Gaylord Simpson (June 16, 1902 - October 6, 1984) was an American paleontologist. ... Natural selection is a process by which biological populations are altered over time, as a result of the propagation of heritable traits that affect the capacity of individual organisms to survive and reproduce. ... Charles Darwin, father of the theory of evolution by natural selection. ... Speciation refers to the appearance of a new species of life on earth, particularly as seen in the fossil record. ... In philosophy, essence is the attribute (or set of attributes) that make an object or substance what it fundamentally is. ... Gustav Heinrich Theodor Eimer (1843-1898) was a German zoologist. ...

The orthogenesis hypothesis had a significant following in the 19th century when a number of evolutionary mechanisms, such as Lamarckism, were being proposed. Jean-Baptiste Lamarck himself accepted the idea, and it had a central role in his theory of inheritance of acquired characteristics, the hypothesised mechanism of which resembled the "mysterious inner force" of orthogenesis. Other proponents of orthogenesis included Leo Berg, philosopher Henri Bergson and, for a time, the paleontologist Henry Fairfield Osborn. Orthogenesis was particularly accepted by paleontologists who saw in their fossils a directional change, and in invertebrate paleontology thought there was a gradual and constant directional change. Those who accepted orthogenesis in this way, however, did not necessarily accept that the mechanism that drove orthogenesis was teleological. This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Transmutation of species refers to the altering of one species into another. ... In biology, saltation (from Latin, saltus, leap) is a sudden change from one generation to the next, that is large, or very large, in comparison with the usual variation of an organism. ... Lamarckism is a now discredited theory of biological evolution developed by French biologist Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck in the 19th century. ... Charles Darwin, father of the theory of evolution by natural selection. ... Alternative meaning: Nineteenth Century (periodical) (18th century — 19th century — 20th century — more centuries) As a means of recording the passage of time, the 19th century was that century which lasted from 1801-1900 in the sense of the Gregorian calendar. ... Lamarckism is a now discredited theory of biological evolution developed by French biologist Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck in the 19th century. ... Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck (August 1, 1744 - December 28, 1829) was a major 19th century French naturalist, who was one of the first to use the term biology in its modern sense. ... Henri Bergson Henri-Louis Bergson (October 18, 1859 – January 4, 1941) was a French philosopher, influential in France, but out of the main currents of his time. ... Henry Fairfield Osborn (August 8, 1857 — November 6, 1935) was an American paleontologist and geologist. ... A Classification of Invertebrate Paleontology Kingdom Protoctista Phylum Protozoa Subphylum Sarcomastigophora Class Sarcodina Subclass Rhizopoda Order Foraminifera Suborder Allogromiina Suborder Textulariina Suborder Fusulinina Suborder Miliolina Suborder Rotaliina Subclass Actinopoda Order Radiolaria Kingdom Monera Division Schizomycophyta (bacteria) Division Cyanophyta (cyanobacteria) Kingdom Animalia Phylum Porifera (sponges) Phylum Coelenterata / Cnidaria Phylum Bryzoa Phylum...

Autogenesis is a specific version of orthogenesis which also incorporates spontaneous generation, the refuted hypothesis that each species is created by its own abiogenesis or special creation event. In biology the word autogenesis has been used to describe two similar concepts: Abiogenesis - the origin of life, as used by Aristotle Orthogenesis - a discredited evolutionary idea that hypothesised a directed teleological form of evolution. ... Abiogenesis, in its most general sense, is the hypothetical generation of life from non-living matter. ... Abiogenesis (Greek a-bio-genesis, non biological origins) is, in its most general sense, the hypothetical generation of life from non-living matter. ...

Natural selection is a process by which biological populations are altered over time, as a result of the propagation of heritable traits that affect the capacity of individual organisms to survive and reproduce. ... The gene pool of a species or a population is the complete set of unique alleles that would be found by inspecting the genetic material of every living member of that species or population. ... A group of organisms is said to have common descent if they have a common ancestor. ... Speciation refers to the appearance of a new species of life on earth, particularly as seen in the fossil record. ... Abiogenesis, in its most general sense, is the hypothetical generation of life from non-living matter. ... The modern evolutionary synthesis (often referred to simply as the modern synthesis), neo-Darwinian synthesis or neo-Darwinism, brings together Charles Darwins theory of the evolution of species by natural selection with Gregor Mendels theory of genetics as the basis for biological inheritance. ... Charles Darwin in 1854, five years prior to the publication of The Origin of Species Charles Robert Darwin (12 February 1809–19 April 1882) was a British naturalist who achieved lasting fame as originator of the theory of evolution through natural selection. ... The 1859 edition of On the Origin of Species First published in 1859, The Origin of Species (full title On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) by British naturalist Charles Darwin is one of the pivotal... The modern evolutionary synthesis (often referred to simply as the modern synthesis), neo-Darwinian synthesis or neo-Darwinism, brings together Charles Darwins theory of the evolution of species by natural selection with Gregor Mendels theory of genetics as the basis for biological inheritance. ... The modern evolutionary synthesis (often referred to simply as the modern synthesis), neo-Darwinian synthesis or neo-Darwinism, brings together Charles Darwins theory of the evolution of species by natural selection with Gregor Mendels theory of genetics as the basis for biological inheritance. ...

Collapse of the hypothesis

The orthogenesis hypothesis began to collapse when it became clear that it could not explain the patterns found by paleontologists in the fossil record, which was non-linear with many complications. The hypothesis was generally abandoned when no mechanism could be found that would account for the process, and the theory of evolution by natural selection became the prevailing theory of evolution. The modern evolutionary synthesis, in which the genetic mechanisms of evolution were discovered, refuted the hypothesis for good. As more was understood about these mechanisms it became obvious that there was no possible naturalistic way in which the newly discovered mechanism of heredity could be far-sighted or have a memory of past trends. A paleontologist carefully chips rock from a column of dinosaur vertebrae. ... Ever since recorded history began, and probably before, people have found pieces of rock and other hard material with indentations from the remains of dead organisms. ... The modern evolutionary synthesis (often referred to simply as the modern synthesis), neo-Darwinian synthesis or neo-Darwinism, brings together Charles Darwins theory of the evolution of species by natural selection with Gregor Mendels theory of genetics as the basis for biological inheritance. ... Genetics (from the Greek genno γεννώ= give birth) is the science of genes, heredity, and the variation of organisms. ... For the scientific journal Heredity see Heredity (journal) Heredity (the adjective is hereditary) is the transfer of characters from parent to offspring, either through their genes or through the social institution called inheritance (for example, a title of nobility is passed from individual to individual according to relevant customs and...

A few hung on to the orthogenesis hypothesis as late as the 1950s by claiming that the processes of macroevolution, the long term trends in evolution, were distinct from the processes of microevolution (genetic variation and natural selection) which were by then well understood and it was known they could not behave in an orthogenetic manner. Teilhard de Chardin, a Jesuit paleontologist, in The Phenomenon of Man (a book influential among non-scientists that was published four years after his death in 1959) argued for evolution aiming for the "omega point", while putting man at the center of the universe and accounting for original sin (Dennett 1995, von Kitzing 1998). This form of orthogenesis has now also been abandoned as more about evolutionary processes has been discovered (Wilkins 1997). // Events and trends The 1950s in Western society was marked with a sharp rise in the economy for the first time in almost 30 years and return to the 1920s-type consumer society built on credit and boom-times, as well as the height of the baby-boom from returning... Macroevolution is the concept that evolution of species and higher taxa is the result of large-scale changes in gene-frequencies over time. ... Microevolution is the occurrence of small-scale changes in gene frequencies in a population over a few generations, also known as change at or below the species level. ... The gene pool of a species or a population is the complete set of unique alleles that would be found by inspecting the genetic material of every living member of that species or population. ... Natural selection is a process by which biological populations are altered over time, as a result of the propagation of heritable traits that affect the capacity of individual organisms to survive and reproduce. ... This article needs cleanup. ... The Society of Jesus (Latin: Societas Iesu), commonly known as the Jesuits, is a Roman Catholic religious order. ... 1959 was a common year starting on Thursday of the Gregorian calendar. ... The deepest visible-light image of the cosmos. ... Original sin is the religious doctrine, shared in one form or another by most Christian denominations, which holds that human nature is morally and ethically disordered due to the disobedience of mankinds earliest parents to the revealed will of God. ...

The refutation of orthogenesis had some ramifications in the field of philosophy, as it refuted the idea of teleology as first postulated by Aristotle and accepted by Immanuel Kant, who had greatly influenced many scientists. Before the scientific and philosophical revolution that began with Charles Darwin's ideas, the prevailing philosophy was that the world was teleological and purposeful, and that science was the study of God's creation. The refutation of these concepts have led to a shift in what science and scientists are perceived to be. The term philosophy derives from a combination of the Greek words philos meaning love and sophia meaning wisdom. ... Aristotle (sculpture) Aristotle (Greek: Αριστοτέλης Aristotelēs; 384 BC – March 7, 322 BC) was an ancient Greek philosopher. ... Immanuel Kant (April 22, 1724 – February 12, 1804) was a German philosopher and geographer from Prussia, generally regarded as one of Europes most influential thinkers and the last major philosopher of the Enlightenment. ... Charles Darwin in 1854, five years prior to the publication of The Origin of Species Charles Robert Darwin (12 February 1809–19 April 1882) was a British naturalist who achieved lasting fame as originator of the theory of evolution through natural selection. ... The term God (capitalized in English language as a proper noun) is often used to refer to a Supreme Being. ... In its widest sense, creationism (from the Latin creatio) refers to the theological doctrine that all material in the universe was created by a divine agency, such as God, out of nothingness (ex nihilo). ...

Modern co-opted usage

Though teleological linear evolution has been refuted, it is not true that evolution never proceeds in a linear way, reinforcing characteristics, in certain lineages at times, for example, during a period of slow, sustained environmental change, but such examples are entirely consistent with the modern neo-Darwinian theory of evolution. These examples have sometimes been referred to as orthogenetic (e.g. by Jacobs et al 1995) but are not strictly orthogenetic, and simply appear as linear and constant changes because of environmental and molecular constraints on the direction of change.

References and sources

1. Bateson, William, 1909. Heredity and variation in modern lights, in Darwin and Modern Science (A.C. Seward ed.). Cambridge University Press. Chapter V. E-book.
2. Dennett, Daniel, 1995. Darwin's Dangerous Idea. Simon & Schuster.
3. Huxley, Julian, 1942. The Modern Evolutionary Synthesis, London: George Allen and Unwin.
4. Jacobs, Susan C., Allan Larson & James M. Cheverud, 1995. Phylogenetic Relationships and Orthogenetic Evolution of Coat Color Among Tamarins (Genus Saguinus). Syst. Biol. 44(4):515--532, Abstract.
5. Mayr, Ernst, 2002. What Evolution Is, London: Weidenfeld and Nicolson.
6. Simpson, George G., 1957. Life Of The Past: Introduction to Paleontology. Yale University Press, p.119.
7. Wilkins, John, 1997. What is macroevolution?. Talk Origins archive [1] (14:08 UTC, Oct 13 2004)