A brief treatment of absolutism follows. For full treatment, see Absolutism (Europe, history of).

The most commonly studied form of absolutism is absolute monarchy, which originated in early modern Europe (Europe, history of) and was based on the strong individual leaders of the new nation-states that were created at the breakup of the medieval order. The power of these states was closely associated with the power of their rulers; to strengthen both, it was necessary to curtail the restraints on centralized government that had been exercised by the church, feudal lords, and medieval customary law. By claiming the absolute authority of the state against such former restraints, the monarch as head of state claimed his own absolute authority.

By the 16th century monarchical absolutism prevailed in much of western Europe, and it was widespread in the 17th and 18th centuries. Besides France, whose absolutism was epitomized by Louis XIV, absolutism existed in a variety of other European countries, including Spain, Prussia, and Austria.

The most common defense of monarchical absolutism, known as “the divine right of kings” theory, asserted that kings derived their authority from God. This view could justify even tyrannical rule as divinely ordained punishment, administered by rulers, for human sinfulness. In its origins, the divine-right theory may be traced to the medieval conception of God's award of temporal power to the political ruler, while spiritual power was given to the head of the Roman Catholic church. However, the new national monarchs asserted their authority in all matters and tended to become heads of church as well as of state, as did King Henry VIII when he became head of the newly created Church of England in the 16th century. Their power was absolute in a way that was impossible to achieve for medieval monarchs, who were confronted by a church that was essentially a rival centre of authority.