A society (/səˈsaɪəti/) is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. Societies are characterized by patterns of relationships (social relations) between individuals who share a distinctive culture and institutions; a given society may be described as the sum total of such relationships among its constituent members.

Human social structures are complex and highly cooperative, featuring the specialization of labor via social roles. Societies construct roles and other patterns of behavior by deeming certain actions or concepts acceptable or unacceptable—these expectations around behavior within a given society are known as societal norms. So far as it is collaborative, a society can enable its members to benefit in ways that would otherwise be difficult on an individual basis.

Societies vary based on level of technology and type of economic activity. Larger societies with larger food surpluses often exhibit stratification or dominance patterns. Societies can have many different forms of government, various ways of understanding kinship, and different gender roles. Human behavior varies immensely between different societies; humans shape society, but society in turn shapes human beings.

The term "society" often refers to a large group of people in an ordered community, in a country or several similar countries, or the "state of being with other people", as in "they lived in medieval society". The term dates back to at least 1513 and comes from the 12th-century French societe (modern French société) meaning 'company'. Societe was in turn derived from the Latin word societas ('fellowship, alliance, association'), which in turn was derived from the noun socius ('comrade, friend, ally').

The word "social" derives from the Latin word socii ('allies'). It is particularly derived from the Italian Socii states, historical allies of the Roman Republic, though they rebelled against Rome in the Social War of 91–87 BC.

Humans, along with their closest relatives bonobos and chimpanzees, are highly social animals. This biological context suggests that the underlying sociability required for the formation of societies is hardwired into human nature. Human society features high degrees of cooperation, and differs in important ways from groups of chimps and bonobos, including the parental role of males, the use of language to communicate, the specialization of labor, and the tendency to build "nests" (multigenerational camps, town, or cities).

Some biologists, including entomologist E.O. Wilson, categorize humans as eusocial, placing humans with ants in the highest level of sociability on the spectrum of animal ethology, although others disagree. Social group living may have evolved in humans due to group selection in physical environments that made survival difficult.

In Western sociology, there are three dominant paradigms for understanding society: functionalism (also known as structural functionalism), conflict theory, and symbolic interactionism.