Trade is the act by which people swap something of value (such as products, resources, money) to obtain another valuable item. It involves the transfer of goods and services from one person or entity (seller) to another (buyer), often in exchange for money.

In one modern view, trade exists due to specialization and the division of labour, a predominant form of economic activity in which individuals and groups concentrate on a small aspect of production, but use their output in trade for other products and needs. Trade exists between regions because different regions may have a comparative advantage (perceived or real) in the production of some trade-able goodsincluding the production of scarce or limited natural resources elsewhere. For example, different regions' sizes may encourage mass production. In such circumstances, trading at market price between locations can benefit both locations. Different types of traders may specialize in trading different kinds of goods; for example, the spice trade and grain trade have both historically been important in the development of a global, international economy. Retail trade consists of the sale of goods or merchandise from a fixed location,Compare peddling and other types of retail trade: online or by mail, in small or individual lots for direct consumption or use by the purchaser.

Historically, openness to free trade substantially increased in some areas from 1815 until the outbreak of World War I in 1914. Trade openness increased again during the 1920s but collapsed (in particular in Europe and North America) during the Great Depression of the 1930s. Trade openness increased substantially again from the 1950s onward (albeit with a slowdown during the oil crisis of the 1970s). Economists and economic historians contend that current levels of trade openness are the highest they have ever been.

Etymology Trade is from Middle English trade ("path, course of conduct"), introduced into English by Hanseatic merchants, from Middle Low German trade ("track, course"), from Old Saxon trada ("spoor, track"), from Proto-Germanic *tradō ("track, way"), and cognate with Old English tredan ("to tread").

Commerce is derived from the Latin commercium, from cum "together" and merx, "merchandise."

History

Prehistory Trade originated from human communication in prehistoric times. Prehistoric peoples exchanged goods and services with each other in a gift economy before the innovation of modern-day currency. Recent research finds evidence that early humans developed trade networks for obsidian 15,000 years ago as well as ostrich egg shell beads 50,000 years ago.

In the Mediterranean region, the earliest contact between cultures involved members of the species Homo sapiens, principally using the Danube river, at a time beginning 35,000–30,000 BP.Compare: National Maritime Historical Society. Sea History, Issues 13–25. , published by National Maritime Historical Society 1979. Retrieved 2012-06-26.

There is evidence of the exchange of obsidian and flint during the Stone Age. Trade in obsidian is believed to have taken place in New Guinea from 17,000 BCE.

Robert Carr Bosanquet investigated trade in the Stone Age by excavations in 1901.Donald A. Mackenzie. Myths of Crete and Pre-Hellenic Europe – published 1917. – . Retrieved 2012-06-09. The first clear archaeological evidence of trade in manufactured goods is found in south west Asia.P. Singh. Neolithic cultures of western Asia, , Seminar Press, 20 August 1974.

Archaeological evidence of obsidian use provides data on how this material was increasingly the preferred choice rather than chert from the late Mesolithic to Neolithic, requiring exchange as deposits of obsidian are rare in the Mediterranean region.P. Goldberg, V. T. Holliday, C. Reid Ferring. Earth Sciences and Archaeology. . Springer, 2001, . Retrieved 2012-06-28.S. L. Dyson, R. J. Rowland. Archaeology And History In Sardinia From The Stone Age To The Middle Ages: Shepherds, Sailors, & Conquerors. . University of Pennsylvania – Museum of Archaeology, 2007, . Retrieved 2012-06-28.

Obsidian provided the material to make cutting utensils or tools, although since other more easily obtainable materials were available, use was exclusive to the higher status of the tribe using "the rich man's flint". Obsidian has held its value relative to flint.

Early traders traded Obsidian at distances of 900 kilometres within the Mediterranean region.

Trade in the Mediterranean during the Neolithic of Europe was greatest in this material..Douglas Harper. etymology online. . Retrieved 2012-06-09. Networks were in existence at around 12,000 BCE. Anatolia was the source primarily for trade with the Levant, Iran and Egypt according to Zarins study of 1990.(secondary) . + + . + . + . . Melos and Lipari sources produced among the most widespread trading in the Mediterranean region as known to archaeology..

The Sari-i-Sang mine in the mountains of Afghanistan was the largest source for trade of lapis lazuli. The material was most largely traded during the Kassite period of Babylonia beginning 1595 BCE. Routledge 2007. Retrieved 2012-07-03. .S. Bertman. Handbook To Life In Ancient Mesopotamia Oxford University Press, 2005. Retrieved 2012-07-03. .

Ancient history

Mediterranean and Near East Ebla was a prominent trading-center during the third millennium BCE, with a network reaching into Anatolia and north Mesopotamia...Bamber Gascoigne et al. HistoryWorld.net.

Materials used for making jewelry were traded with Egypt from 3000 BCE. Long-range trade routes first appeared in the 3rd millennium BCE, when Sumerians in Mesopotamia traded with the Harappan civilization of the Indus Valley. The Phoenicians were noted maritime traders, traveling across the Mediterranean Sea and as far north as Britain for sources of tin to manufacture bronze. For this purpose they established trading colonies which the Greeks called emporia. Along the coasts of the Mediterranean, researchers have found a positive relationship between how well-connected a coastal location was and the local prevalence of archaeological sites from the Iron Age. This suggests that a location's trade potential was an important determinant of human settlements.Jan David Bakker, Stephan Maurer, Jörn-Steffen Pischke and Ferdinand Rauch. 2021. "Of Mice and Merchants: Connectedness and the Location of Economic Activity in the Iron Age." Review of Economics and Statistics, 103 (4): 652–665.

From the beginning of Greek civilization until the fall of the Roman Empire in the 5th century CE, a financially lucrative trade brought valuable spice to Europe from the far east, including India and China. Roman commerce allowed its empire to flourish and endure, notable by importing grain to Italy from Sicily and from Egypt. The latter Roman Republic and the Pax Romana of the Roman empire produced a stable and secure transportation-network that enabled the shipment of trade goods without fear of significant piracy, as Rome had become the sole effective sea-power in the Mediterranean with the conquest of Egypt and the near east.Pax Romana let average villagers throughout the Empire conduct day-to-day affairs without fear of armed attack.

In ancient Greece Hermes was the god of tradeP. D. Curtin. Cross-Cultural Trade in World History. . Cambridge University Press, 1984. . Retrieved 2012-06-25.N. O. Brown. Hermes the Thief: The Evolution of a Myth. . SteinerBooks, 1990. . Retrieved 2012-06-25. (commerce) and weights and measures.D. Sacks, O. Murray. A Dictionary of the Ancient Greek World. . Oxford University Press, 1997. . Retrieved 2012-06-26. In ancient Rome, Mercurius was the god of merchants, whose festival was celebrated by traders on the 25th day of the fifth month.Alexander S. Murray. Manual of Mythology. . Wildside Press LLC, 2008. . Retrieved 2012-06-25.John R. Rice. Filled With the Spirit. . Sword of the Lord Publishers, 2000. . Retrieved 2012-06-25. The concept of free trade was an antithesis to the will and economic direction of the sovereigns of the ancient Greek states. Free trade between states was stifled by the need for strict internal controls (via taxation) to maintain security within the treasury of the sovereign, which nevertheless enabled the maintenance of a modicum of civility within the structures of functional community life.Johannes Hasebroek. Trade and Politics in Ancient Greece. . Biblo & Tannen Publishers, 1933. Retrieved 2012-07-04. .Cambridge dictionaries online.

The fall of the Roman empire and the succeeding Dark Ages brought instability to Western Europe and a near-collapse of the trade network in the western world. Trade, however, continued to flourish among the kingdoms of Africa, the Middle East, India, China, and Southeast Asia. Some trade did occur in the west. For instance, Radhanites were a medieval guild or group (the precise meaning of the word is lost to history) of Jewish merchants who traded between the Christians in Europe and the Muslims of the Near East.

Indo-Pacific

The first true maritime trade network in the Indian Ocean was by the Austronesian peoples of Island Southeast Asia. Initiated by the indigenous peoples of Taiwan and the Philippines, the Maritime Jade Road was an extensive trading network connecting multiple areas in Southeast and East Asia. Its primary products were made of jade mined from Taiwan by Taiwanese indigenous peoples and processed mostly in the Philippines by indigenous Filipinos, especially in Batanes, Luzon, and Palawan. Some were also processed in Vietnam, while the peoples of Malaysia, Brunei, Singapore, Thailand, Indonesia, and Cambodia also participated in the massive trading network. The maritime road is one of the most extensive sea-based trade networks of a single geological material in the prehistoric world. It was in existence for at least 3,000 years, where its peak production was from 2000 BCE to 500 CE, older than the Silk Road in mainland Eurasia and the later Maritime Silk Road. The Maritime Jade Road began to wane during its final centuries from 500 CE until 1000 CE. The entire period of the network was a golden age for the diverse societies of the region.Everington, K. (2017). Birthplace of Austronesians is Taiwan, capital was Taitung: Scholar. Taiwan News.

Sea-faring Southeast Asians also established trade routes with Southern India and Sri Lanka as early as 1500 BC, ushering an exchange of material culture (like catamarans, outrigger boats, sewn-plank boats, and paan) and cultigens (like coconuts, sandalwood, bananas, and sugarcane); as well as connecting the material cultures of India and China. Indonesians, in particular were trading in spices (mainly cinnamon and cassia) with East Africa using catamaran and outrigger boats and sailing with the help of the Westerlies in the Indian Ocean. This trade network expanded to reach as far as Africa and the Arabian Peninsula, resulting in the Austronesian colonization of Madagascar by the first half of the first millennium AD. It continued up to historic times, later becoming the Maritime Silk Road.

Mesoamerica

The emergence of exchange networks in the Pre-Columbian societies of and near to Mexico are known to have occurred within recent years before and after 1500 BCE.

Trade networks reached north to Oasisamerica. There is evidence of established maritime trade with the cultures of northwestern South America and the Caribbean.

Middle Ages

Western Europe established a complex and expansive trade network with cargo ships being the main carrier of goods; cogs and hulks are two examples of such cargo ships. Many ports would develop their own extensive trade networks. The English port city of Bristol traded with peoples from Iceland, all along the western coast of France, and south to present-day Spain.

During the Middle Ages, Central Asia was the economic center of the world.Beckwith (2011), p. xxiv.