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Influence
Inca-era terraces on Taquile are used to grow traditional Andean staples such as quinoa and potatoes, alongside wheat, a European introduction.

Crops
Portuguese trading animals in Japan; detail of Nanban panel (1570–1616)

Several plants native to the Americas have spread around the world, including potato, maize, tomato, and tobacco. Before 1500, potatoes were not grown outside of South America. By the 19th century they were found in nearly every cookpot in Europe and had conquered India and North America. Potatoes eventually became an important staple of the diet in much of Europe, contributing to about 25% of the population growth in Afro-Eurasia between 1700 and 1900. Many European rulers, including Frederick the Great of Prussia and Catherine the Great of Russia, encouraged the cultivation of the potato.

Maize and cassava, introduced by the Portuguese from South America in the 16th century, have replaced sorghum and millet as Africa's most important food crops. 16th-century Spanish colonizers introduced new staple crops to Asia from the Americas, including maize and sweet potatoes, and thereby contributed to population growth in Asia. On a larger scale, the coming of potatoes and maize to the old world "resulted in caloric and nutritional improvements over previously existing staples" throughout the Eurasian landmass as they created more varied and abundant food production.

Tomatoes, which came to Europe from the New World via Spain, were initially prized in Italy mainly for their ornamental value (see below). But starting in the 19th century, tomato sauces became typical of Neapolitan cuisine and, ultimately, Italian cuisine in general. Coffee (introduced in the Americas circa 1720) from Africa and the Middle East and sugarcane (introduced from the Indian subcontinent) from the Spanish West Indies became the main export commodity crops of extensive Latin American plantations. Introduced to India by the Portuguese, chili and potatoes from South America have become an integral part of Indian cuisine.

Rice
Rice was another crop that became widely cultivated during the Columbian exchange. As the demand in the New World grew, so did the knowledge on how to cultivate it. The two primary species used were Oryza glaberrima and Oryza sativa, originating from West Africa and Southeast Asia respectively. Slaveholders in the New World relied upon the skills of enslaved Africans to further cultivate both species. North and South Carolina were key places where rice was grown during the slave trade, and islands of the Caribbean like Puerto Rico and Cuba were equally great centers of production. Enslaved Africans brought their knowledge of water control, milling, winnowing, and other general agrarian practices to the fields. This widespread knowledge amongst enslaved Africans eventually led to rice becoming a staple dietary item in the New World.

Fruits
Citrus fruits and grapes were brought to the Americas from the Mediterranean. At first these crops struggled to adapt to the climate in the new world but by the late 19th century they were growing more consistently.

Bananas were introduced to the Americas by Portuguese sailors who brought the fruits from West Africa during their enslavement of Africans in the 16th century. Bananas were still only consumed in minimal amounts during the 1880s. The U.S. didn't see major rises in banana consumption until banana plantations in the Caribbean grew. The History of modern banana plantations in the Americas details the spread of this crop within the Americas.

Tomatoes
It took three centuries after their introduction in Europe for tomatoes to become widely accepted. Tobacco, potatoes, chili peppers, tomatillos, and tomatoes are all members of the nightshade family. All of these plants bear some resemblance to the European nightshade that even an amateur could deduce just by simple observation of the flowers and berries. Similar to some European Nightshade varieties, tomatoes and potatoes can be harmful or even lethal, if the wrong part of the plant is consumed at the wrong quantity. Of all the New World plants introduced to Italy, only the potato took as long as the tomato to gain acceptance. 16th-century physicians, thus, had good reason to be wary that this native Mexican fruit was poisonous and the generator of "melancholic humours". In 1544, Pietro Andrea Mattioli, a Tuscan physician and botanist, suggested that tomatoes might be edible, but no record exists of anyone consuming them at this time. On October 31, 1548, the tomato was given its first name anywhere in Europe when a house steward of Cosimo I de' Medici, Duke of Florence, wrote to the De' Medici's private secretary that the basket of pomi d'oro "had arrived safely". At this time, the label pomi d'oro was also used to refer to figs, melons, and citrus fruits in treatises by scientists.

In the early years, tomatoes were mainly grown as ornamentals in Italy. For example, the Florentine aristocrat Giovan Vettorio Soderini wrote how they "were to be sought only for their beauty" and were grown only in gardens or flower beds. Tomatoes were grown in elite town and country gardens in the fifty years or so following their arrival in Europe and were only occasionally depicted in works of art. However, in 1592 the head gardener at the botanical garden of Aranjuez near Madrid, under the patronage of Philip II of Spain, wrote, "it is said [tomatoes] are good for sauces". Besides this account, tomatoes remained exotic plants grown for ornamental purposes, but rarely for culinary use. The combination of pasta with tomato sauce was developed only in the late nineteenth century. Today around 32,000 acres (13,000 ha) of tomatoes are cultivated in Italy, although there are still areas where relatively few tomatoes are grown and consumed.

Livestock
Further information: Plains Indians § The horse

Initially at least, the Columbian exchange of animals largely went in one direction, from Europe to the New World, as the Eurasian regions had domesticated many more animals. Horses, donkeys, mules, pigs, cattle, sheep, goats, chickens, large dogs, cats and bees were rapidly adopted by native peoples for transport, food, and other uses. One of the first European exports to the Americas, the horse, changed the lives of many Native American tribes. Organizing of biotic material for shipment to the Indies was one of the responsibilities of the royal trading monopoly known as the Casa de la Contratación, founded in 1503 in Seville. Livestock breeding pairs and seeds in sealed containers were put on board ship at Seville. The mountain tribes shifted to a nomadic lifestyle, as opposed to agriculture, based on hunting bison on horseback and moved down to the Great Plains. The existing Plains tribes expanded their territories with horses, and the animals were considered so valuable that horse herds became a measure of wealth.

The effects of the introduction of European livestock on the environments and peoples of the New World were not always positive. In the Caribbean, the proliferation of European animals had large effects on native fauna and undergrowth and damaged conucos, plots managed by indigenous peoples for subsistence.

Mapuche of Araucanía were fast to adopt the horse from the Spanish improving their military capabilities as the Arauco War raged between Spanish and Mapuches. Until the arrival of the Spanish the Mapuches had had Chilihueque (Llama) livestock. The introduction of sheep caused some competition among both domestic species. Anecdotal evidence of the mid-17th century show that both species coexisted but that there were many more sheep than chilihueques. The decline of chilihueques reached a point in the late 18th century when only the Mapuche from Mariquina and Huequén next to Angol raised the animal. In Chiloé Archipelago the introduction by the Spanish of pigs proved a success as they benefited from abundant shellfish and algae exposed by the large tides.

Disease
Further information: Native American disease and epidemics, Influx of disease in the Caribbean, Virgin soil epidemic, and Cocoliztli epidemics

European exploration of tropical areas was aided by the New World discovery of quinine, the first effective treatment for malaria. Europeans suffered from this disease, but some indigenous populations had developed at least partial resistance to it. In Africa, resistance to malaria has been associated with other genetic changes among sub-Saharan Africans and their descendants, which can cause sickle-cell disease. In fact, the resistance of sub-Saharan Africans to malaria in the Southern United States contributed to the development of slavery in those regions.

Before regular communication had been established between the two hemispheres, the varieties of domesticated animals and infectious diseases that jumped to humans, such as smallpox, were substantially more numerous in the Old World than in the New due to more extensive long-distance trade networks. Many had migrated west across Eurasia with animals or people, or were brought by traders from Asia, so diseases of two continents were suffered by all occupants. While Europeans and Asians were affected by the Eurasian diseases, their endemic status in those continents over centuries resulted in many people gaining acquired immunity.

By contrast, "Old World" diseases had a devastating effect when introduced to Native American populations via European carriers, as the people in the Americas had no natural immunity to the new diseases. Measles caused many deaths. The smallpox epidemics are believed to have caused the largest death tolls among Native Americans, surpassing any wars and far exceeding the comparative loss of life in Europe due to the Black Death. It is estimated that upwards of 80–95 percent of the Native American population died in these epidemics within the first 100–150 years following 1492. Within 50 years following contact with Columbus and his crew, the native Taino population of the island of Hispanola, which had an estimated population between 60,000 and 8 million, was virtually extinct. Many regions in the Americas lost 100%. The beginning of demographic collapse on the North American continent has typically been attributed to the spread of a well-documented smallpox epidemic from Hispaniola in December 1518. At that point in time, approximately only 10,000 indigenous people were still alive on Hispaniola.

Similarly, yellow fever is thought to have been brought to the Americas from Africa via the Atlantic slave trade. Because it was endemic in Africa, many people there had acquired immunity. Europeans suffered higher rates of death than did African-descended persons when exposed to yellow fever in Africa and the Americas, where numerous epidemics swept the colonies beginning in the 17th century and continuing into the late 19th century. The disease caused widespread fatalities in the Caribbean during the heyday of slave-based sugar plantation. The replacement of native forests by sugar plantations and factories facilitated its spread in the tropical area by reducing the number of potential natural mosquito predators. The means of yellow fever transmission was unknown until 1881, when Carlos Finlay suggested that the disease was transmitted through mosquitoes, now known to be female mosquitoes of the species Aedes aegypti.

The history of syphilis has been well-studied, but the exact origin of the disease is unknown and remains a subject of debate. There are two primary hypotheses: one proposes that syphilis was carried to Europe from the Americas by the crew of Christopher Columbus in the early 1490s, while the other proposes that syphilis previously existed in Europe but went unrecognized. These are referred to as the "Columbian" and "pre-Columbian" hypotheses. The first written descriptions of the disease in the Old World came in 1493. The first large outbreak of syphilis in Europe occurred in 1494/1495 in Naples, Italy, among the army of Charles VIII, during their invasion of Naples. Many of the crew members who had served on the voyage joined this army. After the victory, Charles's largely mercenary army returned to their respective homes, thereby spreading "the Great Pox" across Europe and triggering the deaths of more than five million people. Early on, in the late fifteenth and early sixteenth centuries, the disease was frequently fatal, and its symptoms were much more severe. They included genital ulcers, rashes, large tumors, severe pain, dementia, and eventual death. Over time, as the disease evolved, its symptoms changed, becoming more benign and less fatal.

Cultural exchanges
One of the influences related to the migration of people were cultural exchanges. For example, in the article "The Myth of Early Globalization: The Atlantic Economy, 1500–1800" Pieter Emmer makes the point that "from 1500 onward, a 'clash of cultures' had begun in the Atlantic". This clash of culture transferred European values to indigenous cultures. For example, the emergence of private property in regions where there were little to no rights to lands, the concepts of monogamy and the nuclear family, the role of women and children in the family system, and the "superiority of free labor". An example of this type of cultural exchange occurred during the 1500s in North America. When these early European colonizers first entered North America, they encountered fence-less lands which indicated to them that this land was unimproved. For these Europeans, they were seeking economic opportunities, therefore, land and resources were important for the success of the mission. When these colonizers entered North America they encountered a fully established culture of people called the Powhatan. The Powhatan farmers in Virginia scattered their farm plots within larger cleared areas. These larger cleared areas were a communal place for naturally growing and useful plants. As the Europeans viewed fences as "hallmarks of civilization" they set about transforming "the land into something more suitable for themselves". In implementing their practices, the Europeans enslaved, murdered, and exploited indigenous populations. Furthermore, in cases of enslaved peoples (and in particular, enslaved Africans) the Europeans simultaneously implemented their value system while at the same time justifying enslaving people through a philosophy which reduced the enslaved people to property. Thus, the slave traders and some of the plantation owners used the concept of family to exploit and control the enslaved people. In other subtle ways, which had a large impact the cultural exchanges involved sharing practices and traditions. An example of this can be found in the tobacco industry.

Tobacco was one of the luxury goods which was spread as a direct result of the Columbian exchange. As is discussed in regard to the trans-Atlantic slave trade, the tobacco trade increased demand for free labor and spread tobacco worldwide. In discussing the widespread uses of tobacco, the Spanish physician Nicolas Monardes (1493–1588) noted that "The black people that have gone from these parts to the Indies, have taken up the same manner and use of tobacco that the Indians have". As the European colonizers and enslaved Africans traveled the globe and came into contact with indigenous peoples, they took with them the cultural practices related to tobacco, and spread them to additional regions. Therefore, demand for tobacco grew in the course of the cultural exchanges and increased contacts among peoples.

While Mapuche people did adopt the horse, sheep, and wheat, the over-all scant adoption of Spanish technology by Mapuche has been characterized as mean of cultural resistance.

Atlantic slave trade
Enslaved Africans were chained and bound before taken on ships to the New World The Atlantic slave trade was the transfer of Africans from primarily West Africa to parts of the Americas between the 16th and 19th century. About 10 million slaves arrived in the Americas from Africa. The journey that enslaved Africans took from parts of Africa to America is commonly known as the middle passage.

Enslaved Africans had a significant influence on the emerging African-American culture in the New World as well as all other nations to where they were transported, especially the Caribbean and Brazil. The presence of enslaved Africans not only represented skilled labor but it also gave way to a new population which represented a hybrid of the two cultures. The Birth of African American Culture: An Anthropological Perspective is a book written by Sidney Mintz and Richard Price further detailing the cultural impact of enslaved Africans in America. Mintz and Price's book helped to publicize how integral the socialization aspects of plantation life were to the structures of black culture.

The treatment of enslaved Africans during the Atlantic slave trade became one of the most controversial topics in the history of the New World. Since its abolishment in 1865 in the USA and its total extinction by 1890 in the rest of the New World, it has remained a key subject in politics, pop culture and media.