The term empire derives from the Latin imperium (power, authority). Politically, an empire is a geographically extensive group of states and peoples (ethnic groups) united and ruled either by a monarch (emperor, empress) or an oligarchy.
Aside from the traditional usage, the term empire can be used in an extended sense to denote a large-scale business enterprise (e.g. a transnational corporation), or a political organisation of either national-, regional- or city scale, controlled either by a person (a political boss) or a group authority (political bosses).
An imperial political structure is established and maintained in two ways: (i) as a territorial empire of direct conquest and control with force (direct, physical action to compel the emperor’s goals), and (ii) as a coercive, hegemonic empire of indirect conquest and control with power (the perception that the emperor can physically enforce his desired goals). The former provides greater tribute and direct political control, yet…