Anarchism

The Sixth Doctor compared the spread of anarchy to the plague and claimed that "the rule of law must prevail". (TV: The Ultimate Foe)

Jules Renan believed there could be "no loyalty or honour where anarchy prevails". (TV: The Reign of Terror)

20th century
In the 1930s during the Spanish Civil War, the Confederación Nacional del Trabajo fought for anarchy. (PROSE: History 101)

Jean-Pierre Rex was an anarchist in the 1960s. (PROSE: Revolution Man)

In the early 1970s, when was arrested at Devil's End, the media described him as radical anarchist who aimed to destroy Western society. (PROSE: Who Killed Kennedy)

Black Star was a British anarchist organisation active during the mid-1970s. (PROSE: No Future)

21st century
During the environmental and social chaos of the early 21st century, anarchist movements sprang up in response. (PROSE: Cat's Cradle: Warhead)

Post-21st century
The Travellers were anarchist neo-pagans active during the time of the Earth Empire in the 26th century. (PROSE: Love and War)

The Freedom Foundation was a group of militant anarchists active in the year 200,000 which opposed the manipulations of Satellite Five. Eva Saint Julienne was the last known member not to have been killed or captured. (TV: The Long Game)

Parallel universes
In one alternate universe, a Time Lord described "Theta Sigma" as a "wretched little anarchist". (AUDIO: Exile)