White Overalls, Black Blocs

Anarchism

A political theory holding all forms of governmental authority to be unnecessary and undesirable and advocating a society based on voluntary cooperation and free association of individuals and groups.

Black Bloc 

A collection of anarchists that organize together for a particular protest action. Their goals are to give an anarchist critique of issues and to provide solidarity in the face of what they consider repressive police action. Black is the color of anarchism.

White Overalls

A movement of disenfranchised European youth organized against the economics of neo-liberalism. They wear white overalls as a symbol of the invisibility of most of the world's work force and other protective apparel, like foam rubber armor, to ward off police batons.