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The 22nd century BC drought marks the end of the Umm Al Nar culture and the change to the Wadi Suq culture. [19] A study of fossil corals in Oman provides evidence that prolonged winter shamal seasons, around 2200 BC, led to the salinization of the irrigated field, which made a dramatic decrease in crop production trigger a widespread famine ...
Human history or world history is the record of humankind from prehistory to the present. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They migrated out of Africa during the Last Ice Age and had spread across Earth's continental land except Antarctica by the end of the Ice Age 12,000 years ago.
A closely related approach focuses on experience rather than activities, examining how members of particular social groups, like social classes, races, genders, or age groups, experienced their world. Other definitions see social history as the study of social problems, like poverty, disease, and crime, or take a broader perspective by ...
It is widely believed that the early Earth was dominated by vertical tectonic processes, such as stagnant lid, [19] [20] heat-pipe, [21] or sagduction, [22] [23] [24] which eventually transitioned to plate tectonics during the planet's mid-stage evolution. However, an alternative view proposes that Earth never experienced a vertical tectonic ...
A world war is an international conflict that involves most or all of the world's major powers. [1] Conventionally, the term is reserved for two major international conflicts that occurred during the first half of the 20th century, World War I (1914–1918) and World War II (1939–1945), although some historians have also characterized other global conflicts as world wars, such as the Nine ...
Historical method is the collection of techniques and guidelines that historians use to research and write histories of the past. Secondary sources, primary sources and material evidence such as that derived from archaeology may all be drawn on, and the historian's skill lies in identifying these sources, evaluating their relative authority, and combining their testimony appropriately in order ...
The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939. [9] Others view the Spanish Civil War as the start or prelude to World War II. [10] [11] The exact date of the war's end also is not universally ...
Timeline of World War I (1914–1924) Timeline of the United Kingdom home front during World War I; Timeline of the Gallipoli Campaign (1915–1916) Timeline of the Irish War of Independence (1919–1921) Timeline of the Irish Civil War (1922–1923) Timeline of the Second Italo-Abyssinian War (1928–1937) Timeline of World War II (1939–1945)
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