The raised fist, or the clenched fist, is a long-standing image of mixed meaning, often a symbol of solidarity, especially with a political movement. It is a common symbol representing a wide range of political ideologies, most notably socialism, communism, anarchism, and trade unionism, and can also be used as a salute expressing unity, strength, or resistance.

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 being interconnected concepts, solidarity, by contrast to charity, takes a systems change approach.