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Cotton is a natural vegetable fiber of great economic importance as a raw material for cloth. Its widespread use is largely due to the ease with which its fibers are spun into yarns. Cotton's strength, absorbency, and capacity to be washed and dyed also make it adaptable to a considerable variety of textile products.

Cotton was cultivated by the inhabitants of the Indus Valley Civilization between the Fifth millennium BC to fourth millennium BC. The Indus cotton industry was well developed and some methods used in cotton spinning and fabrication continued to be used until the modern Industrialization of India. Well before the Common Era the use of cotton textiles had spread from India to the Mediterranean and beyond.

Cotton has been spun, woven, and dyed since prehistoric times. It clothed the people of ancient India, Egypt, and China. Hundreds of years before the Christian era cotton textiles were woven in India with matchless skill, and their use spread to the Mediterranean countries.

In the 1st century Arab traders brought fine muslin and calico to Italy and Spain.

The Moors introduced the cultivation of cotton into Spain in the 9th century.

Fustians and dimities were woven there and in the 14th century. in Venice and Milan, at first with a linen warp. Little cotton cloth was imported to England before the 15th century, although small amounts were obtained chiefly for candlewicks.

By the 17th century. the East India Company was bringing rare fabrics from India. Native Americans skillfully spun and wove cotton into fine garments and dyed tapestries. Cotton fabrics found in Peruvian tombs are said to belong to a pre-Inca culture. In color and texture the ancient Peruvian and Mexican textiles resemble those found in Egyptian tombs.

According to the Foods and Nutrition Encyclopedia, the earliest cultivation of cotton discovered thus far in the Americas occurred in Mexico, some 8,000 years ago. The indigenous species was Gossypium hirsutum which is today the most widely planted species of cotton in the world, constituting about 90% of all production worldwide. The greatest diversity of wild cotton species is found in Mexico, followed by Australia and Africa.

In Iran (Persia), the history of cotton dates back to Achaemenid era (5th century B.C.), however there are few sources about the implantation of cotton in Pre-Islamic Iran. The implantation of cotton was common in Merv, Ray and Pars of Iran (Persia).

In Peru, cultivation of the indigenous cotton species Gossypium barbadense was the backbone of the development of coastal cultures such as the Norte Chico, Moche and Nazca. Cotton was grown upriver, made into nets and traded with fishing villages along the coast for large supplies of fish. The Spanish who came to Mexico in the early 1500s found the people growing cotton and wearing clothing made of it.

During the late medieval period, cotton became known as an imported fiber in northern Europe, without any knowledge of how it was derived, other than that it was a plant; noting its similarities to wool, people in the region could only imagine that cotton must be produced by plant-borne sheep. John Mandeville, writing in 1350, stated as fact the now-preposterous belief: "There grew there

a wonderful tree which bore tiny lambs on the endes of its branches. These branches were so pliable that they bent down to allow the lambs to feed when they are hungrie. This aspect is retained in the name for cotton in many European languages, such as German Baumwolle, which translates as "tree wool" (Baum means "tree"; Wolle means "wool"). By the end of the 16th century, cotton was cultivated throughout the warmer regions in Asia and the Americas.

Cotton remained a key crop in the southern economy after emancipation and the end of the civil war in 1865. Across the South, sharecropping evolved, in which free black farmers worked on white-owned cotton plantations in return for a share of the profits. Cotton plantations required vast labor forces to hand-pick cotton, and it was not until the 1950s that reliable harvesting machinery was introduced into the South (prior to this, cotton-harvesting machinery had been too clumsy to pick cotton without shredding the fibers). During the early twentieth century, employment in the cotton industry fell as machines began to replace laborers, and as the South's rural labor force dwindled during the First and Second World Wars. Today, cotton remains a major export of the southern United States, and a majority of the world's annual cotton crop is of the long-staple American variety.