Anarchism is the political philosophy that opposes the existence of governments. There are many varieties of anarchism.
Most popular versions of anarchism agree that if people cooperate with each other society would not require institutions of systemic coercion including government, criminal organizations, authoritarian religions or economically oppresive business organizations.
Beyond that anarchists disagree on how to achieve a state of anarchy in which the problems created by governments could be resolved by the people themselves. They disagree on what this utopian state might look like.
This page links to essays by the well-known anarchist activist and writer William P. Meyers and also links to other anarchist writers and groups.
Anarchist Federation Attacks Nukes, Nano [May 29, 2012]
Introducing Anarcho-Syndicalism by William P. Meyers
Non-Violence and Its Violent Consequences by William P. Meyers
IWW (Industrial Workers of the World)
General Francisco Franco, who defeated the Anarchists in the Spanish Civil War in 1936-1938
San Francisco Anarchist Book Fair 2007 pictures and narrative