Solidarity is unity (as of a group or class) that produces or is based on community of interests, objectives, and standards. It refers to the ties in a society that bind people together as one. The term is generally employed in sociology and the other social sciences.
What forms the basis of solidarity varies between societies. In simple societies it may be mainly based around kinship and shared values. In more complex societies there are various theories as to what contributes to a sense of social solidarity.
According to Émile Durkheim, the types of social solidarity correlate with types of society. Durkheim introduced the terms "mechanical" and "organic solidarity" as part of his theory of the development of societies in The Division of Labour in Society (1893). In a society exhibiting mechanical solidarity, its cohesion and integration comes from the homogeneity of individuals—people feel connected through similar work, educational and religious training, and lifestyle. Mechanical solidarity normally operates in "traditional" and small scale societies. In simpler societies (e.g., tribal), solidarity is usually based on kinship ties of familial networks. Organic solidarity comes from the interdependence that arises from specialization of work and the complementarities between people—a development which occurs in "modern" and "industrial" societies.
- Definition: it is social cohesion based upon the dependence individuals have on each other in more advanced societies.
Although individuals perform different tasks and often have different values and interest, the order and very solidarity of society depends on their reliance on each other to perform their specified tasks. Organic here is referring to the interdependence of the component parts. Thus social solidarity is maintained in more complex societies through the interdependence of its component parts (e.g., farmers produce the food to feed the factory workers who produce the tractors that allow the farmer to produce the food).
- "Thus, a group's solidarity is a function of two independent factors: first, the extensiveness of its corporate obligations, and, second, the degree to which individual members actually comply with these obligations. Together, these provide the defining elements of solidarity. The greater the average proportion of each member's private resources contributed to collective ends, the greater the solidarity of the group." - Michael Hechter 
- International solidarity is "not an act of charity but an act of unity between allies fighting on different terrains toward the same objectives." - Samora Machel
- "Unlike solidarity, which is horizontal and takes place between equals, charity is top-down, humiliating those who receive it and never challenging the implicit power relations." - Eduardo Galeano
- "The most important word in the language of the working class is solidarity." - Harry Bridges
- "Solidarity is not a matter of altruism. Solidarity comes from the inability to tolerate the affront to our own integrity of passive or active collaboration in the oppression of others, and from the deep recognition of our most expansive self-interest. From the recognition that, like it or not, our liberation is bound up with that of every other being on the planet, and that politically, spiritually, in our heart of hearts we know anything else is unaffordable." - Aurora Levins Morales
- "Solidarity does not assume that our struggles are the same struggles, or that our pain is the same pain, or that our hope is for the same future. Solidarity involves commitment, and work, as well as the recognition that even if we do not have the same feelings, or the same lives, or the same bodies, we do live on common ground." - Sara Ahmed
- "No man is an island, entire of itself; every man is a piece of the continent, a part of the main. If a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a manor of thy friend's or of thine own were: any man's death diminishes me, because I am involved in mankind, and therefore never send to know for whom the bells tolls; it tolls for thee. Neither can we call this a begging of misery, or a borrowing of misery, as though we were not miserable enough of ourselves, but must fetch in more from the next house, in taking upon us the misery of our neighbours. Truly it were an excusable covetousness if we did, for affliction is a treasure, and scarce any man hath enough of it. No man hath affliction enough that is not matured and ripened by and made fit for God by that affliction. If a man carry treasure in bullion, or in a wedge of gold, and have none coined into current money, his treasure will not defray him as he travels. Tribulation is treasure in the nature of it, but it is not current money in the use of it, except we get nearer and nearer our home, heaven, by it. Another man may be sick too, and sick to death, and this affliction may lie in his bowels, as gold in a mine, and be of no use to him; but this bell, that tells me of his affliction, digs out and applies that gold to me: if by this consideration of another's danger I take mine own into contemplation, and so secure myself, by making my recourse to my God, who is our only security." - John Donne, Meditation XVII
- ^ a b Merriam Webster, http://www.merriam-webster.com/dictionary/solidarity.
- ^ a b Collins Dictionary of Sociology, p405-6.
- ^ Hechter, M. 1987 Principles of Group Solidarity, p. 18.
- ^ Galeano, E. 2000 Upside Down: A Primer for the Looking Glass World. Picador, p. 312
- ^ "Links to Our Friends". Theharrybridgesproject.org. Retrieved 2013-03-12.
- ^ Aurora Levins Morales, 1998 Medicine Stories. Boston: South End Press.
- ^ Sara Ahmed, 2004, The Cultural Politics of Emotion, p. 189.
Other reading 
- Ankerl, Guy: Toward a social contract on worldwide scale: Solidarity contract. Geneva, ILO, 1980, ISBN 92-9014-165-4