In politics, a regime (also spelled régime) is the form of government or the set of rules, cultural, or social norms, that regulate the operation of a government or institution and its interactions with society. The two broad categories of regimes are democratic and autocratic. Autocratic regimes can be further[1] divided into types such as dictatorial, totalitarian, absolutist, monarchic, and oligarchic. A key similarity across all regimes is the presence of rulers and formal or informal institutions, which interact dynamically to adapt to changes in their environment[1][2][3]