structural:expansion, structural:summarization
Solidarity or solidarism is an awareness of shared interests, objectives, standards, and sympathies creating a psychological sense of unity of groups or classes. Solidarity does not reject individuals and sees individuals as the basis of society. 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 as well as in philosophy and bioethics. It is a significant concept in Catholic social teaching and in Christian democratic political ideology. Although closely related to the concept of charity, solidarity aspires to change whole systems, not merely to help individuals.

Solidarity is also one of six principles of the Charter of Fundamental Rights of the European Union and December 20 of each year is International Human Solidarity Day recognized as an international observance. Solidarity is not mentioned in the European Convention on Human Rights nor in the United Nations' Universal Declaration of Human Rights and has hence lesser legal meaning when compared to basic rights.

Concepts of solidarity are mentioned in the Universal Declaration on Bioethics and Human Rights, but not defined clearly. As biotechnology and biomedical enhancement research and production increase, the need for distinct definition of solidarity within healthcare system frameworks is important.