In biological terms, a community is a group of interacting organisms (or different species) sharing an environment. In human communities, intent, belief, resources, preferences, needs, risks, and a number of other conditions may be present and common, affecting the identity of the participants and their degree of cohesiveness.
The word "community" is derived from the Old French communité which is derived from the Latin communitas (cum, "with/together" + munus, "gift"), a broad term for fellowship or organized society.
German sociologist Ferdinand Tönnies distinguished between two types of human association: Gemeinschaft (usually translated as "community") and Gesellschaft ("society" or "association"). In his 1887 work, Gemeinschaft and Gesellschaft, Tönnies argued that Gemeinschaft is perceived to be a tighter and more cohesive social entity, due to the presence of a "unity of will." He added that family and kinship were the perfect expressions of Gemeinschaft, but that other shared characteristics, such as place or belief, could also result in Gemeinschaft. Gesellschaft, on the other hand, is a group in which the individuals who make up that group are motivated to take part in the group purely by self-interest. He also proposed that in the real world, no group was either pure Gemeinschaft or pure Gesellschaft, but, rather, a mixture of the two.
If community exists, both freedom and security may exist as well. The community then takes on a life of its own, as people become free enough to share and secure enough to get along. The sense of connectedness and formation of social networks comprise what has become known as social capital.
The same patterns are also evident in several other western countries. Western cultures are thus said to be losing the spirit of community that once were found in institutions including churches and community centers. Sociologist Ray Oldenburg states in The Great Good Place that people need three places: 1) the home, 2) the office, and, 3) the community hangout or gathering place. With this philosophy in mind, many grassroots efforts such as The Project for Public Spaces are being started to create this "Third Place" in communities. They are taking form in independent bookstores, coffeehouses, local pubs, and through many innovative means to create the social capital needed to foster the sense and spirit of community.
In a seminal 1986 study, McMillan and Chavis identify four elements of "sense of community": 1) membership, 2) influence, 3) integration and fulfillment of needs, and 4) shared emotional connection. They give the following example of the interplay between these factors:
Studies conducted by the APPA show substantial evidence that young adults who feel a sense of belonging in a community, particularly small communities, develop fewer psychiatric and depressive disorders than those who do not have the feeling of love and belonging.[citation needed]
Communitarianism as a group of related but distinct philosophies (or ideologies) began in the late 20th century, opposing classical liberalism and capitalism while advocating phenomena such as civil society. Not necessarily hostile to social liberalism, communitarianism rather has a different emphasis, shifting the focus of interest toward communities and societies and away from the individual. The question of priority, whether for the individual or community, must be determined in dealing with pressing ethical questions about a variety of social issues, such as health care, abortion, multiculturalism, and hate speech. Gad Barzilai has critically examined both liberalism and communitarianism and has developed the theory of critical communitarianism. Barzilai has explicated how non-ruling communities are constructing legal cultures while interacting with various facets of political power. Being venues of identity construction justifies collective protections of communities in law, while the boundaries with other communities, states, and global forces should be sensitive to preservation of various cultures. Gad Barzilai has accordingly offered how to protect human rights, individual rights, and multiculturalism in inter-communal context that allows to generating cultural relativism.