Literature, in its broadest sense, is any single body of written works. More restrictively, literature is writing considered to be an art form, or any single writing deemed to have artistic or intellectual value, often due to deploying language in ways that differ from ordinary usage.
Its Latin root literatura/litteratura (derived itself from littera: letter or handwriting) was used to refer to all written accounts, though contemporary definitions extend the term to include texts that are spoken or sung (oral literature). The concept has changed meaning over time: nowadays it can broaden to have non-written verbal art forms, and thus it is difficult to agree on its origin, which can be paired with that of language or writing itself. Developments in print technology have allowed an evergrowing distribution and proliferation of written works, culminating in electronic literature.
Literature can be classified according to whether it is fiction or non-fiction, and whether it is poetry or prose. It can be further distinguished according to major forms such as the novel, short story or drama; and works are often categorized according to historical periods or their adherence to certain aesthetic features or expectations (genre).
There have been various attempts to define "literature". Simon and Delyse Ryan begin their attempt to answer the question "What is Literature?" with the observation:
The quest to discover a definition for "literature" is a road that is much travelled, though the point of arrival, if ever reached, is seldom satisfactory. Most attempted definitions are broad and vague, and they inevitably change over time. In fact, the only thing that is certain about defining literature is that the definition will change. Concepts of what is literature change over time as well. 
Definitions of literature have varied over time: it is a "culturally relative definition". In Western Europe prior to the 18th century, literature denoted all books and writing. A more restricted sense of the term emerged during the Romantic period, in which it began to demarcate "imaginative" writing. Contemporary debates over what constitutes literature can be seen as returning to older, more inclusive notions; Cultural studies, for instance, takes as its subject of analysis both popular and minority genres, in addition to canonical works.
The value judgment definition of literature considers it to cover exclusively those writings that possess high quality or distinction, forming part of the so-called belles-lettres ('fine writing') tradition. This sort of definition is that used in the Encyclopædia BritannicaEleventh Edition (1910–11) when it classifies literature as "the best expression of the best thought reduced to writing." Problematic in this view is that there is no objective definition of what constitutes "literature": anything can be literature, and anything which is universally regarded as literature has the potential to be excluded, since value judgments can change over time.
The formalist definition is that "literature" foregrounds poetic effects; it is the "literariness" or "poetic" of literature that distinguishes it from ordinary speech or other kinds of writing (e.g., journalism). Jim Meyer considers this a useful characteristic in explaining the use of the term to mean published material in a particular field (e.g., "scientific literature"), as such writing must use language according to particular standards. The problem with the formalist definition is that in order to say that literature deviates from ordinary uses of language, those uses must first be identified; this is difficult because "ordinary language" is an unstable category, differing according to social categories and across history.
Etymologically, the term derives from Latin literatura/litteratura "learning, a writing, grammar," originally "writing formed with letters," from litera/littera "letter". In spite of this, the term has also been applied to spoken or sung texts.
Poetry is a form of literary art which uses aesthetic and rhythmic qualities of language to evoke meanings in addition to, or in place of, prosaic ostensible meaning. Poetry has traditionally been distinguished from proseby its being set in verse;[a] prose is cast in sentences, poetry in lines; the syntax of prose is dictated by meaning, whereas that of poetry is held across meter or the visual aspects of the poem. Prior to the 19th century, poetry was commonly understood to be something set in metrical lines; accordingly, in 1658 a definition of poetry is "any kind of subject consisting of Rhythm or Verses". Possibly as a result of Aristotle's influence (his Poetics), "poetry" before the 19th century was usually less a technical designation for verse than a normative category of fictive or rhetorical art. As a form it may pre-date literacy, with the earliest works being composed within and sustained by an oral tradition; hence it constitutes the earliest example of literature.
Prose is a form of language that possesses ordinary syntax and natural speech rather than rhythmic structure; in which regard, along with its measurement in sentences rather than lines, it differs from poetry. On the historical development of prose, Richard Graff notes that "[In the case of Ancient Greece] recent scholarship has emphasized the fact that formal prose was a comparatively late development, an "invention" properly associated with the classical period".
Drama is literature intended for performance. The form is often combined with music and dance, as in opera and musical theater. A play is a subset of this form, referring to the written dramatic work of a playwright that is intended for performance in a theater; it comprises chiefly dialogue between characters, and usually aims at dramatic or theatrical performance rather than at reading. A closet drama, by contrast, refers to a play written to be read rather than to be performed; hence, it is intended that the meaning of such a work can be realized fully on the page. Nearly all drama took verse form until comparatively recently.
Greek drama exemplifies the earliest form of drama of which we have substantial knowledge. Tragedy, as a dramatic genre, developed as a performance associated with religious and civic festivals, typically enacting or developing upon well-known historical or mythological themes. Tragedies generally presented very serious themes. With the advent of newer technologies, scripts written for non-stage media have been added to this form. War of the Worlds (radio) in 1938 saw the advent of literature written for radio broadcast, and many works of Drama have been adapted for film or television. Conversely, television, film, and radio literature have been adapted to printed or electronic media.
The history of literature follows closely the development of civilization. When defined exclusively as written work, Ancient Egyptian literature, along with Sumerian literature, are considered the world's oldest literatures. The primary genres of the literature of Ancient Egypt—didactic texts, hymns and prayers, and tales—were written almost entirely in verse; while use of poetic devices is clearly recognizable, the prosodyof the verse is unknown. The question of whether Sumerian literature was poetry or prose remains unanswered. It did contain at least one feature of poetry (left-justified lines), but the style of writing precludes the detection of certain other identifying features.
Different historical periods are reflected in literature. National and tribal sagas, accounts of the origin of the world and of customs, and myths which sometimes carry moral or spiritual messages predominate in the pre-urban eras. The epics of Homer, dating from the early to middle Iron age, and the great Indian epics of a slightly later period, have more evidence of deliberate literary authorship, surviving like the older myths through oral tradition for long periods before being written down.
Literature in all its forms can be seen as written records, whether the literature itself be factual or fictional, it is still quite possible to decipher facts through things like characters' actions and words or the authors' style of writing and the intent behind the words. The plot is for more than just entertainment purposes; within it lies information about economics, psychology, science, religions, politics, cultures, and social depth. Studying and analyzing literature becomes very important in terms of learning about our[who?] history. Through the study of past literature we[who?] are able to learn about how society has evolved and about the societal norms during each of the different periods all throughout history. This can even help us to understand references made in more modern literature because authors often make references to Greek mythology and other old religious texts or historical moments. Not only is there literature written on each of the aforementioned topics themselves, and how they have evolved throughout history (like a book about the history of economics or a book about evolution and science, for example) but one can also learn about these things in fictional works. Authors often include historical moments in their works, like when Lord Byron talks about the Spanish and the French in "Childe Harold's Pilgrimage: Canto I" and expresses his opinions through his character Childe Harold. Through literature we are able to continuously uncover new information about history. It is easy to see how all academic fields have roots in literature. Information became easier to pass down from generation to generation once we began to write it down. Eventually everything was written down, from things like home remedies and cures for illness, or how to build shelter to traditions and religious practices. From there people were able to study literature, improve on ideas, further our knowledge, and academic fields such as the medical field or trades could be started. In much the same way as the literature that we study today continue to be updated as we[who?] continue to evolve and learn more and more.
As a more urban culture developed, academies provided a means of transmission for speculative and philosophical literature in early civilizations, resulting in the prevalence of literature in Ancient China, Ancient India, Persia and Ancient Greece and Rome. Many works of earlier periods, even in narrative form, had a covert moral or didactic purpose, such as the Sanskrit Panchatantra or the Metamorphoses of Ovid. Drama and satire also developed as urban culture provided a larger public audience, and later readership, for literary production. Lyric poetry (as opposed to epic poetry) was often the speciality of courts and aristocratic circles, particularly in East Asia where songs were collected by the Chinese aristocracy as poems, the most notable being the Shijing or Book of Songs. Over a long period, the poetry of popular pre-literate balladry and song interpenetrated and eventually influenced poetry in the literary medium.
In ancient China, early literature was primarily focused on philosophy, historiography, military science, agriculture, and poetry. China, the origin of modern paper making and woodblock printing, produced the world's first print cultures. Much of Chinese literature originates with the Hundred Schools of Thought period that occurred during the Eastern Zhou Dynasty (769‒269 BCE). The most important of these include the Classics of Confucianism, of Daoism, of Mohism, of Legalism, as well as works of military science (e.g. Sun Tzu's The Art of War) and Chinese history (e.g. Sima Qian's Records of the Grand Historian). Ancient Chinese literature had a heavy emphasis on historiography, with often very detailed court records. An exemplary piece of narrative history of ancient China was the Zuo Zhuan, which was compiled no later than 389 BCE, and attributed to the blind 5th-century BCE historian Zuo Qiuming.
In ancient India, literature originated from stories that were originally orally transmitted. Early genres included drama, fables, sutras and epic poetry. Sanskrit literature begins with the Vedas, dating back to 1500–1000 BCE, and continues with the Sanskrit Epicsof Iron Age India. The Vedas are among the oldest sacred texts. The Samhitas (vedic collections) date to roughly 1500–1000 BCE, and the "circum-Vedic" texts, as well as the redaction of the Samhitas, date to c. 1000‒500 BCE, resulting in a Vedic period, spanning the mid-2nd to mid 1st millennium BCE, or the Late Bronze Age and the Iron Age. The period between approximately the 6th to 1st centuries BC saw the composition and redaction of the two most influential Indian epics, the Mahabharata and the Ramayana, with subsequent redaction progressing down to the 4th century AD. Other major literary works are Ramcharitmanas & Krishnacharitmanas.
In ancient Greece, the epics of Homer, who wrote the Iliad and the Odyssey, and Hesiod, who wrote Works and Days and Theogony, are some of the earliest, and most influential, of Ancient Greek literature. Classical Greek genres included philosophy, poetry, historiography, comedies and dramas. Plato and Aristotle authored philosophical texts that are the foundation of Western philosophy, Sappho and Pindar were influential lyric poets, and Herodotus and Thucydides were early Greek historians. Although drama was popular in Ancient Greece, of the hundreds of tragedies written and performed during the classical age, only a limited number of plays by three authors still exist: Aeschylus, Sophocles, and Euripides. The plays of Aristophanes provide the only real examples of a genre of comic drama known as Old Comedy, the earliest form of Greek Comedy, and are in fact used to define the genre.
Roman histories and biographies anticipated the extensive mediaeval literature of lives of saints and miraculous chronicles, but the most characteristic form of the Middle Ages was the romance, an adventurous and sometimes magical narrative with strong popular appeal. Controversial, religious, political and instructional literature proliferated during the Renaissance as a result of the invention of printing, while the mediaeval romance developed into a more character-based and psychological form of narrative, the novel, of which early and important examples are the Chinese Monkey and the German Faust books.
In the Age of Reason philosophical tracts and speculations on history and human nature integrated literature with social and political developments. The inevitable reaction was the explosion of Romanticism in the later 18th century which reclaimed the imaginative and fantastical bias of old romances and folk-literature and asserted the primacy of individual experience and emotion. But as the 19th century went on, European fiction evolved towards realism and naturalism, the meticulous documentation of real life and social trends. Much of the output of naturalism was implicitly polemical, and influenced social and political change, but 20th century fiction and drama moved back towards the subjective, emphasizing unconscious motivations and social and environmental pressures on the individual. Writers such as Proust, Eliot, Joyce, Kafka and Pirandello exemplify the trend of documenting internal rather than external realities.
Genre fiction also showed it could question reality in its 20th century forms, in spite of its fixed formulas, through the enquiries of the skeptical detective and the alternative realities of science fiction. The separation of "mainstream" and "genre" forms (including journalism) continued to blur during the period up to our own times. William Burroughs, in his early works, and Hunter S. Thompson expanded documentary reporting into strong subjective statements after the second World War, and post-modern critics have disparaged the idea of objective realism in general.
There are numerous awards recognizing achievement and contribution in literature. Given the diversity of the field, awards are typically limited in scope, usually on: form, genre, language, nationality and output (e.g. for first-time writers or debut novels).
The Nobel Prize in Literature was one of the six Nobel Prizes established by the will of Alfred Nobel in 1895, and is awarded to an author on the basis of their body of work, rather than to, or for, a particular work itself.[b] Other literary prizes for which all nationalities are eligible include: the Neustadt International Prize for Literature, the Man Booker International Prize and the Franz Kafka Prize.
Philosophical, historical, journalistic, and scientific writings are traditionally ranked as literature. They offer some of the oldest prose writings in existence; novels and prose stories earned the names "fiction" to distinguish them from factual writing or nonfiction, which writers historically have crafted in prose.
As advances and specialization have made new scientific research inaccessible to most audiences, the "literary" nature of science writing has become less pronounced over the last two centuries. Now, science appears mostly in journals. Scientific works of Aristotle, Copernicus, and Newton still exhibit great value, but since the science in them has largely become outdated, they no longer serve for scientific instruction. Yet, they remain too technical to sit well in most programs of literary study. Outside of "history of science" programs, students rarely read such works.