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.
Sociology of terrorism
Terrorists use violence because they believe that if they did not use violence they would lose a power struggle, which lead many conflict theorists to view it as a weapon of the weak. In Iraq, between March 2003 and February 2006, 443 suicide missions took place with 71% belonging to al-Qaeda. They justified their actions in religious terms; viewing the Shi'a control of Iraq as abandoning religious principles. Suicide attacks against the Iraqi regime and its American and British supporters were seen as the means in which to accomplish this. Yet it was only under certain political conditions that suicide bombings spiked. The first condition being that it was in relation with the counterinsurgency of the American and British militaries. The second being a strategic response to the Shi'a control becoming more stabilized in Iraq. Terrorists do not have the money or the political power that is needed to wage war, so they use terrorism as a means, not a goal, to agitate the government in order to achieve their political objectives. Before committing an act of terror, a terrorist does not always weigh the cost and benefits of their actions, but rather is reacting from the humiliation and frustration they feel they are being subjected too.