Economic collapse in the context of "Hyperinflation"

Societal collapse (also known as civilizational collapse or systems collapse) is the fall of a complex human society characterized by the loss of cultural identity and of social complexity as an adaptive system, the downfall of government, and the rise of violence. Possible causes of a societal collapse include natural catastrophe, war, pestilence, famine, economic collapse, population decline or overshoot, mass migration, incompetent leaders, and sabotage by rival civilizations. A collapsed society may revert to a more primitive state, be absorbed into a stronger society, or completely disappear.

Virtually all civilizations have suffered such a fate, regardless of their size or complexity. Most never recovered, such as the Western and Eastern Roman Empires, the Maya civilization, and the Easter Island civilization. However, some of them later revived and transformed, such as China, Greece, and Egypt.

The Crisis of the Third Century, also known as the Military Anarchy or the Imperial Crisis, was a period in Roman history during which the Roman Empire nearly collapsed under the combined pressure of repeated foreign invasions, civil wars and economic disintegration. At the height of the crisis, the Roman state split into three distinct and competing polities. The period is usually dated between the death of Severus Alexander (235) and accession of Diocletian (284).

The crisis began in 235 with the assassination of Emperor Severus Alexander by his own troops. During the following years, the empire saw barbarian invasions and migrations into Roman territory, civil wars, peasant rebellions and political instability, with multiple usurpers competing for power. This led to the debasement of currency and a breakdown in both trade networks and economic productivity, with the Plague of Cyprian contributing to the disorder. Roman armies became more reliant over time on the growing influence of the barbarian mercenaries known as foederati. Roman commanders in the field, although nominally loyal to the state, became increasingly independent of Rome's central authority.

A provisional government, also called an interim, emergency, or transitional government is a temporary government formed to manage a period of transition, often following state collapse, revolution, civil war, or some combination thereof.

Provisional governments generally come to power in connection with the sudden, catastrophic and irreversible collapse of the previous political system, resulting from revolution, coup d'état, civil war, military defeat so catastrophic as to result in political disintegration, economic collapse, the death of a strongman ruler, or other circumstances which have resulted in a nonfunctional national government. Questions of democratic transition and state-building are often fundamental to the formation and policies of such governments.

The Year of the Six Emperors was the year AD 238, during which six men made claims to be emperors of Rome. This was an early symptom of what historians now call the Crisis of the Third Century (AD 235–285), a period in which the Roman Empire nearly collapsed under the combined pressures of foreign invasions and migrations into the Roman territory, plagues, civil wars, peasant rebellions, political instability (with multiple usurpers competing for power), Roman reliance on (and growing influence of) foreign mercenaries known as foederati and commanders nominally working for Rome (but increasingly independent), the devastating social and economic effects of the plague, debasement of currency, and economic depression. The crisis ended with the final victory of Diocletian and his implementation of reforms in 285.

The Year of the Six Emperors may be called the Year of the Seven Emperors if Gaius Julius Verus Maximus, the son of Maximinus Thrax is counted. He bore the title caesar but not augustus. Edward Gibbon, in his History of the Decline and Fall of the Roman Empire, includes Maximus when he notes how "in the space of a few months, six princes had been cut off by the sword", before Gordian III became sole emperor.

The Rust Belt, formerly the Steel Belt or Factory Belt, is an area of the United States that underwent substantial industrial decline in the late 20th century. The region is centered in the Great Lakes and Mid Atlantic regions of the United States. Common definitions of the Rust Belt include Ohio, Indiana, Northern Illinois, southeastern Wisconsin, Michigan, Pennsylvania, and Upstate New York. Some broader geographic definitions of the region include parts of Central Illinois, Iowa, Kentucky, Maryland, Minnesota, Missouri, New Jersey, and West Virginia. The term "Rust Belt" is considered to be a pejorative by some people in the region.

Between the late 19th century and late 20th century, the Rust Belt formed the industrial heartland of the country, and its economies were largely based on iron and steel, automobile manufacturing, coal mining, and the processing of raw materials. The term "Rust Belt", derived from the substance rust, refers to the socially corrosive effects of economic decline, population loss, and urban decay attributable to deindustrialization. The term gained popularity in the U.S. beginning in the 1980s, when it was commonly contrasted with the Sun Belt, whose economy was then thriving.