Terrorism
Terrorist acts frequently have a political purpose. Some official, governmental definitions of terrorism use the criterion of the illegitimacy or unlawfulness of the act. to distinguish between actions authorized by a government (and thus "lawful") and those of other actors, including individuals and small groups. For example, carrying out a strategic bombing on an enemy city, which is designed to affect civilian support for a cause, would not be considered terrorism if it were authorized by a government. This criterion is inherently problematic and is not universally accepted, because: it denies the existence of state terrorism. An associated term is violent non-state actor.
State terrorism
The Encyclopædia Britannica Online defines terrorism generally as "the systematic use of violence to create a general climate of fear in a population and thereby to bring about a particular political objective", and states that "terrorism is not legally defined in all jurisdictions." The encyclopedia adds that "[e]stablishment terrorism, often called state or state-sponsored terrorism, is employed by governments – or more often by factions within governments – against that government's citizens, against factions within the government, or against foreign governments or groups."