Etiology (pronounced ; alternatively: aetiology or ætiology) is the study of
causation or origination. The word is derived from the
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
(''aitiología'') "giving a reason for" (, ''aitía'', "cause"); and (''
-logía''). More completely, etiology is the study of the causes, origins, or reasons behind the way that things are, or the way they function, or it can refer to the causes themselves. The word is commonly used in
medicine
Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...
(pertaining to causes of disease) and in
philosophy, but also in
physics
Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ...
,
psychology
Psychology is the scientific study of mind and behavior. Psychology includes the study of conscious and unconscious phenomena, including feelings and thoughts. It is an academic discipline of immense scope, crossing the boundaries between ...
,
government
A government is the system or group of people governing an organized community, generally a state.
In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is ...
,
geography
Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, an ...
,
spatial analysis
Spatial analysis or spatial statistics includes any of the formal techniques which studies entities using their topological, geometric, or geographic properties. Spatial analysis includes a variety of techniques, many still in their early deve ...
,
theology
Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...
, and
biology
Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary i ...
, in reference to the causes or origins of various
phenomena.
In the past, when many physical phenomena were not well understood or when histories were not recorded,
myths often arose to provide etiologies. Thus, an etiological myth, or
origin myth
An origin myth is a myth that describes the origin of some feature of the natural or social world. One type of origin myth is the creation or cosmogonic myth, a story that describes the creation of the world. However, many cultures have st ...
, is a myth that has arisen, been told over time or written to explain the origins of various social or natural phenomena. For example,
Virgil
Publius Vergilius Maro (; traditional dates 15 October 7021 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Roman poet of the Augustan period. He composed three of the most famous poems in Latin literature: th ...
's ''
Aeneid
The ''Aeneid'' ( ; la, Aenē̆is or ) is a Latin epic poem, written by Virgil between 29 and 19 BC, that tells the legendary story of Aeneas, a Trojan who fled the fall of Troy and travelled to Italy, where he became the ancestor of th ...
'' is a
national myth
A national myth is an inspiring narrative or anecdote about a nation's past. Such myths often serve as important national symbols and affirm a set of national values. A national myth may sometimes take the form of a national epic or be incorpor ...
written to explain and glorify the origins of the
Roman Empire
The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post- Republican period of ancient Rome. As a polity, it included large territorial holdings around the Mediter ...
. In
theology
Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...
, many religions have
creation myths
A creation myth (or cosmogonic myth) is a symbolic narrative of how the world began and how people first came to inhabit it., "Creation myths are symbolic stories describing how the universe and its inhabitants came to be. Creation myths develop ...
explaining the origins of the world or its relationship to believers.
Medicine
In medicine, the etiology of an illness or condition refers to the frequent studies to determine one or more factors that come together to cause the illness. Relatedly, when disease is widespread,
epidemiological
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population.
It is a cornerstone of public health, and shapes policy decisions and evidenc ...
studies investigate what associated factors, such as location, sex, exposure to chemicals, and many others, make a population more or less likely to have an illness, condition, or disease, thus helping determine its etiology. Sometimes determining etiology is an imprecise process. In the past, the etiology of a common sailor's disease,
scurvy
Scurvy is a disease resulting from a lack of vitamin C (ascorbic acid). Early symptoms of deficiency include weakness, feeling tired and sore arms and legs. Without treatment, decreased red blood cells, gum disease, changes to hair, and bleeding ...
, was long unknown. When large, ocean-going ships were built, sailors began to put to sea for long periods of time, and often lacked fresh fruit and vegetables. Without knowing the precise cause,
Captain James Cook
James Cook (7 November 1728 Old Style date: 27 October – 14 February 1779) was a British explorer, navigator, cartographer, and captain in the British Royal Navy, famous for his three voyages between 1768 and 1779 in the Pacific Ocean and ...
suspected scurvy was caused by the lack of vegetables in the diet. Based on his suspicion, he forced his crew to eat
sauerkraut
Sauerkraut (; , "sour cabbage") is finely cut raw cabbage that has been fermented by various lactic acid bacteria. It has a long shelf life and a distinctive sour flavor, both of which result from the lactic acid formed when the bacteria ferm ...
, a cabbage preparation, every day, and based upon the positive outcomes, he
inferred
Inferences are steps in reasoning, moving from premises to logical consequences; etymologically, the word '' infer'' means to "carry forward". Inference is theoretically traditionally divided into deduction and induction, a distinction that i ...
that it prevented scurvy, even though he did not know precisely why. It took about another two hundred years to discover the precise etiology; the lack of
vitamin C
Vitamin C (also known as ascorbic acid and ascorbate) is a water-soluble vitamin found in citrus and other fruits and vegetables, also sold as a dietary supplement and as a topical 'serum' ingredient to treat melasma (dark pigment spots) ...
in a sailor's diet.
The following are examples of intrinsic factors:
* Inherited conditions, or conditions that are passed down to you from your parents. An example of this is hemophilia, a disorder that leads to excessive bleeding.
* Metabolic and endocrine, or hormone, disorders. These are abnormalities in the chemical signaling and interaction in the body. For example, Diabetes mellitus is an endocrine disease that causes high blood sugar.
* Neoplastic disorders or cancer where the cells of the body grow out of control.
* Problems with immunity, such as allergies, which are an overreaction of the immune system.
Mythology
An etiological myth, or origin myth, is a
myth intended to explain the origins of cult practices, natural phenomena, proper names and the like. For example, the name
Delphi and its associated deity, ''
Apollon Delphinios'', are explained in the
Homeric Hymn
The ''Homeric Hymns'' () are a collection of thirty-three anonymous ancient Greek hymns celebrating individual gods. The hymns are "Homeric" in the sense that they employ the same epic meter—dactylic hexameter—as the ''Iliad'' and ''Odyssey'', ...
which tells of how Apollo, in the shape of a
dolphin
A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the ...
('), propelled
Cretans
Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cyprus, and ...
over the seas to make them his priests. While Delphi is actually related to the word ' ("womb"), many etiological myths are similarly based on
folk etymology (the term "
Amazon
Amazon most often refers to:
* Amazons, a tribe of female warriors in Greek mythology
* Amazon rainforest, a rainforest covering most of the Amazon basin
* Amazon River, in South America
* Amazon (company), an American multinational technolog ...
", for example). In the ''
Aeneid
The ''Aeneid'' ( ; la, Aenē̆is or ) is a Latin epic poem, written by Virgil between 29 and 19 BC, that tells the legendary story of Aeneas, a Trojan who fled the fall of Troy and travelled to Italy, where he became the ancestor of th ...
'' (published circa 17 BC),
Virgil
Publius Vergilius Maro (; traditional dates 15 October 7021 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Roman poet of the Augustan period. He composed three of the most famous poems in Latin literature: th ...
claims the descent of
Augustus Caesar's
Julian clan from the hero
Aeneas
In Greco-Roman mythology, Aeneas (, ; from ) was a Trojan hero, the son of the Trojan prince Anchises and the Greek goddess Aphrodite (equivalent to the Roman Venus). His father was a first cousin of King Priam of Troy (both being grandsons ...
through his son
Ascanius, also called Iulus. The story of
Prometheus
In Greek mythology, Prometheus (; , , possibly meaning " forethought")Smith"Prometheus". is a Titan god of fire. Prometheus is best known for defying the gods by stealing fire from them and giving it to humanity in the form of technology, kn ...
' sacrifice
trick at Mecone in
Hesiod
Hesiod (; grc-gre, Ἡσίοδος ''Hēsíodos'') was an ancient Greek poet generally thought to have been active between 750 and 650 BC, around the same time as Homer. He is generally regarded by western authors as 'the first written poet ...
's ''
Theogony
The ''Theogony'' (, , , i.e. "the genealogy or birth of the gods") is a poem by Hesiod (8th–7th century BC) describing the origins and genealogies of the Greek gods, composed . It is written in the Epic dialect of Ancient Greek and contain ...
'' relates how Prometheus tricked
Zeus
Zeus or , , ; grc, Δῐός, ''Diós'', label= genitive Boeotian Aeolic and Laconian grc-dor, Δεύς, Deús ; grc, Δέος, ''Déos'', label= genitive el, Δίας, ''Días'' () is the sky and thunder god in ancient Greek reli ...
into choosing the bones and fat of the first sacrificial animal rather than the meat to justify why, after a sacrifice, the Greeks offered the bones wrapped in fat to the gods while keeping the meat for themselves. In
Ovid
Pūblius Ovidius Nāsō (; 20 March 43 BC – 17/18 AD), known in English as Ovid ( ), was a Roman poet who lived during the reign of Augustus. He was a contemporary of the older Virgil and Horace, with whom he is often ranked as one of the th ...
's ''
Pyramus and Thisbe
Pyramus and Thisbe are a pair of ill-fated lovers whose story forms part of Ovid's ''Metamorphoses''. The story has since been retold by many authors.
Pyramus and Thisbe are two lovers in the city of Babylon who occupy connected houses. Their r ...
'', the origin of the color of mulberries is explained, as the white berries become stained red from the blood gushing forth from their double suicide.
See also
*
Backstory
A backstory, background story, back-story, or background is a set of events invented for a plot, presented as preceding and leading up to that plot. It is a literary device of a narrative history all chronologically earlier than the narrative o ...
*
Bradford Hill criteria The Bradford Hill criteria, otherwise known as Hill's criteria for causation, are a group of nine principles that can be useful in establishing epidemiologic evidence of a causal relationship between a presumed cause and an observed effect and have ...
*
Correlation does not imply causation
*
Creation myth
*
Just-so story
In science and philosophy, a just-so story is an untestable narrative explanation for a cultural practice, a biological trait, or behavior of humans or other animals. The pejorative nature of the expression is an implicit criticism that remind ...
* ''
Just So Stories
''Just So Stories for Little Children'' is a 1902 collection of origin stories by the British author Rudyard Kipling. Considered a classic of children's literature, the book is among Kipling's best known works.
Kipling began working on the ...
''
*
Pathology
Pathology is the study of the causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in ...
*
Pourquoi story
A pourquoi story (" pourquoi" means "why" in French), also known as an origin story, pourquoi tale or an etiological tale, is a fictional narrative that explains why something is the way it is, for example why a snake has no legs, or why a tiger ha ...
*
Problem of causation
*
Involution (esoterism)
The term involution has various meanings. In some instances it refers to a process prior to evolution which gives rise to the cosmos, in others it is an aspect of evolution, and in still others it is a process that follows the completion of evoluti ...
References
External links
*
{{Time in philosophy
Origin myths
Mythography
Mythology
Origins
Philosophy of science