The nineteenth century political philosophy that supported the viewpoint that all governments are corrupt and should be overthrown often by violent means. The leading advocate of this position was Mikhail Bakunin.
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 (Websters).
An ideology adopted by various revolutionary groups operating in Europe and North America from the latter half of the nineteenth century until the first two decades of the twentieth century. It promoted the overthrow of tyranny. Anarchists primarily targeted heads of state and senior government officials for assassination.
Anarchism is a political philosophy or group of doctrines and attitudes centered on rejection of any form of compulsory government (cf. "state"Some differentiate government from state: "A distinction that is relevant to the anarchist ideal is the difference between the government, referring to the state, and government, referring to the administration of a political system. Anarchists, like everyone, tend to use the word government as a synonym for state, but what is rejected by anarchism's a priori opposition to the state is not the concept of government as such but the idea of a sovereign order that claims and demands obedience, and if necessary, the lives of its subjects. Anarchism rejects the form of imposed, centralized authority enshrined and made material in the state." -Sheehan, Sean.