Lustration in the context of "Lustration in Poland"

Political repression is the act of a state entity controlling a citizenry by force for political reasons, particularly for the purpose of restricting or preventing the citizenry's ability to take part in the political life of a society, thereby reducing their standing among their fellow citizens. Repression tactics target the citizenry who are most likely to challenge the political ideology of the state in order for the government to remain in control. In autocracies, the use of political repression is to prevent anti-regime support and mobilization. It is often manifested through policies such as human rights violations, surveillance abuse, police brutality, kangaroo courts, imprisonment, involuntary settlement, stripping of citizen's rights, lustration, and violent action or terror such as murder, summary executions, torture, forced disappearance, and other extrajudicial punishment of political activists, dissidents, or the general population. Direct repression tactics are those targeting specific actors who become aware of the harm done to them while covert tactics rely on the threat of citizenry being caught (wiretapping and monitoring). The effectiveness of the tactics differs: covert repression tactics cause dissidents to use less detectable opposition tactics while direct repression allows the citizenry to witness and react to the repression. Political repression can also be reinforced by means outside of written policy, such as by public and private media ownership and by self-censorship within the public.

Where political repression is sanctioned and organised by the state, it may constitute state terrorism, genocide, politicide or crimes against humanity. Systemic and violent political repression is a typical feature of dictatorships, totalitarian states and similar regimes. While the use of political repression varies depending on the authoritarian regime, it is argued that repression is a defining feature and the foundation of autocracies by creating a power hierarchy between the leader and citizenry, contributing to the longevity of the regime. Repressive activities have also been found within democratic contexts as well. This can even include setting up situations where the death of the target of repression is the result. If political repression is not carried out with the approval of the state, a section of government may still be responsible. Some examples are the COINTELPRO operations by the FBI from 1956 to 1971 and the Palmer Raids from 1919 to 1920.

Lustratio was an ancient Greek and ancient Roman purification ritual. It included a procession and in some circumstances the sacrifice of a pig (sus), a ram (ovis), and a bull (taurus) (suovetaurilia). The name is the source of English "lustration" (a purification).