20th century in the context of "Weapons of mass destruction"

The economy of the Inca Empire, which lasted from 1438 to 1532, established an economic structure that allowed for substantial agricultural production as well as the exchange of products between communities. It was based on the institution of reciprocity, considered the socioeconomic and political system of the Pre-Columbian Andes. This model has been variously described by scholars throughout the 20th century, but an academic consensus has emerged using the general frameworks of Austrian economist Karl Polanyi.

Inca society is considered to have had some of the most successful centrally organized economies in history. Its effectiveness was achieved through the successful control of labor and the regulation of tribute resources. In Inca society, collective labor was the cornerstone for economic productivity and the achieving of common prosperity. Members of an ayllu (the basic unit of socio-territorial organisation) developed various traditions of solidarity to adapt to the Andean environment. The economic prosperity of the Inca State caused the Spanish conquerors to be impressed by the foreign forms of organisation. According to each ayllu, labor was divided by region, with agriculture centralized in the most productive areas; ceramic production, road construction, textile production, and other skills were also tasks distributed among members of an ayllu. After local needs were satisfied, the state apparatus gathered all surplus that is gathered from ayllus and allocated it where it was needed. Populations of local chiefdoms in the Inca Empire received clothes, food, health care, and schooling in exchange for their labour.

The 19th century began on 1 January 1801 (represented by the Roman numerals MDCCCI), and ended on 31 December 1900 (MCM). It was the 9th century of the 2nd millennium. It was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanded beyond its British homeland for the first time during the 19th century, particularly remaking the economies and societies of the Low Countries, France, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Catholic Church, in response to the growing influence and power of modernism, secularism and materialism, formed the First Vatican Council in the late 19th century to deal with such problems and confirm certain Catholic doctrines as dogma. Religious missionaries were sent from the Americas and Europe to Asia, Africa and the Middle East.

In the Middle East, it was an era of change and reform. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. Reformers were opposed at every turn by conservatives who strove to maintain the centuries-old Islamic laws and social order. The 19th century also saw the collapse of the large Spanish, Portuguese, French and Mughal empires, which paved the way for the growing influence of the British, French, German, Russian, Austro-Hungarian, Italian, and Japanese empires along with the United States.

The 20th century changed the world in unprecedented ways. The World Wars sparked tension between countries and led to the creation of atomic bombs, the Cold War led to the Space Race and the creation of space-based rockets, and the World Wide Web was created. These advancements have played a significant role in citizens' lives and shaped the 21st century into what it is today.

An electric vehicle (EV) is any motorized vehicle whose propulsion is provided fully or mostly by electric power, via grid electricity or from onboard rechargeable batteries. EVs encompass a wide range of transportation modes, including road (electric cars, buses, trucks and personal transporters) and rail vehicles (electric trains, trams and monorails), electric boats and submersibles, electric aircraft (both fixed-wing and multirotors) and electric spacecraft.

Early electric vehicles first came into existence in the late 19th century, when the Second Industrial Revolution brought forth electrification and mass utilization of DC and AC electric motors. Using electricity was among the preferred methods for early motor vehicle propulsion as it provided a level of quietness, comfort and ease of operation that could not be achieved by the gasoline engine cars of the time, but range anxiety due to the limited energy storage offered by contemporary battery technologies hindered any mass adoption of electric vehicles as private transportation throughout the 20th century. Internal combustion engines (both gasoline and diesel engines) were the dominant propulsion mechanisms for cars and trucks for about 100 years, but electricity-powered locomotion remained commonplace in other vehicle types, such as overhead line-powered mass transit vehicles like electric multiple units, streetcars, monorails and trolley buses, as well as various small, low-speed, short-range battery-powered personal vehicles such as mobility scooters.

1947 (MCMXLVII) was a common year starting on Wednesday of the Gregorian calendar, the 1947th year of the Common Era (CE) and Anno Domini (AD) designations, the 947th year of the 2nd millennium, the 47th year of the 20th century, and the 8th year of the 1940s decade.

It was the first year of the Cold War, which would last until 1991, ending with the dissolution of the Soviet Union.

1908 (MCMVIII) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1908th year of the Common Era (CE) and Anno Domini (AD) designations, the 908th year of the 2nd millennium, the 8th year of the 20th century, and the 9th year of the 1900s decade. As of the start of 1908, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.

This is the longest year in either the Julian or Gregorian calendars, having a duration of 31622401.38 seconds of Terrestrial Time (or ephemeris time), measured according to the definition of mean solar time.

1907 (MCMVII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1907th year of the Common Era (CE) and Anno Domini (AD) designations, the 907th year of the 2nd millennium, the 7th year of the 20th century, and the 8th year of the 1900s decade. As of the start of 1907, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.

Although the concept of luxury cars has evolved over time, from the beginning of the 20th century to 2025. The definition of a luxury car is a passenger automobile built in limited series, with high-quality and cutting-edge materials, and therefore very expensive and intended for an elite clientele, very wealthy to afford it.

In short, a luxury car is an automobile not accessible for the masses. This classification excludes state vehicles: those of presidents, autocrats, dictators, etc. As such, they have technical specifications that go beyond the concept of a luxury car.