Solidarity is the integration, and degree and type of integration, shown by a society or group with people and their neighbours.It refers to the ties in a society - social relations - that bind people to one another. 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.
International solidarity is “not an act of charity but an act of unity between allies fighting on different terrains toward the same objectives.
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.
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.
We belive solidarity is best way for good, strong relationship and unity.