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What is Keynesian economics?

John Maynard Keynes developed his theory of aggregate demand in response to the crisis of the Great Depression. He argued that such disruptions could be prevented if the public sector lowered taxes and invested in make-work jobs projects. This intervention, he argued, has a salutary effect in promoting aggregate demand and promoting manageable growth of the productive sector of the economy. His theory was highly influential during the Roosevelt presidency, and for several decades thereafter, as the U.S. government and the Federal Reserve took activist roles in preventing the cycle of boom and ..

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When did Alexander the Great come to power?

In 340 B.C., while his father invaded Thrace, Alexander was left in charge of Macedonia as regent. In 338 B.C., Philip II made Alexander a commanding general of the Macedonian army. Under his military leadership, the Macedonians were successful in their invasion of Greece. In 336 B.C., Philip II was assassinated after launching an invasion of the Persian Empire. Alexander succeeded his father as King Alexander III. He completed the invasion his father had begun, gaining power over the Persian Empire.

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What are some important events on a timeline of human evolution?

About 2.7 million years ago, Paranthropus lived in woods and grasslands, and the species became extinct around 1.2 million years ago. Homo habilis appeared about 2.5 million years ago with a brain volume of about 600 cubic centimeters. Their faces protruded less than earlier hominids, and they used stone tools.\nHomo ergaster, with brain volumes of nearly 850 cubic centimeters, lived about 2 million years ago. Homo erectus, the first hunter-gatherers, lived in what is now Asia about 1.8 to 1.5 million years ago. They had a brain volume of about 1,000 cubic centimeters, and they were the first ..

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Why is the Articles of Confederation important?

After declaring independence from Great Britain in 1776, the former British colonies existed as sovereign states working cooperatively for the common goal of defeating Great Britain. In 1777, the Continental Congress wrote the document that defined the rights and responsibilities of each state as well as the collective group so all parties felt comfortable participating in the war effort. The document set in place the precedent that made the U.S. Constitution possible when the states saw the benefit of unity and wanted more specifically defined roles.

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What are the names of famous Greek mathematicians?

The ancient Greeks divided mathematics into two different fields: arithmetic and geometry. Arithmetic studied the quantity of numbers and geometry studied the magnitude of the numbers. The Greeks first began using written numerals in 450 B,C,, however, the history of mathematics started in 30000 B.C. when Paleolithic people started to record numerical symbols on pieces of bone. Then, in 25000 B.C., the Egyptians created a decimal number system.In 3000 B.C., the people in the Middle East developed the abacus, which was soon followed by the Babylonians sexagesimal number system. The Greek mathem..

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What did Justinian accomplish during his reign?

When Justinian began his reign he was determined to recapture some of the lands lost during periods of foreign invasion. As a result, he engaged in strict military campaigns across North Africa and the Germanic states. Although he successfully reinstated Revanna's capital status within Italy, he only had a few successes during the 530s, with later campaigns failing due to lack of revenue and support. However, he did manage to expand the Empire significantly.In terms of trade, Justinian imported silk from the Chinese Empire, then manufactured it in factories within the empire. Alongside si..

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Why were people mummified?

The people of ancient Egypt lived very short lives. In fact, the average lifespan was only around 40 years, so preparing for the afterlife was extremely important to the culture at the time. All pharaohs and members of the upper and noble classes were mummified. Those individuals in the middle class that could afford the process were also mummified.

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How did Christopher Columbus change the world?

After Columbus, the Spanish, Portuguese, French, English and Dutch discovered the vast natural resources of the New World. These resources created a period of intense colonization and competition for territory in the Americas.\nThe native population was skeptical of the newcomers and many times violently fought against giving up land to the Europeans, but diseases like smallpox ravaged the indigenous peoples to such an extent that European conquest was relatively easy.\nThe introduction of new crops such as coffee from Africa, sugar cane from Asia and wheat from Europe changed the landscape of..

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Where can you find a list of all Tuskegee airmen?

The names on Tuskegee University's list include all pilot graduates who graduated from the Tuskegee Flight School. The list was taken from the book "Black Knights - The Story of the Tuskegee Airmen," which was written by Thomas Reilly and Lynn M. Holman.Tuskegee University cautions that the list only includes the graduates from the flight school. It does not include the individuals who participated in the pilot training program or the Tuskegee support operations. Participants possessing documented proof of participation as Tuskegee airmen are known as DOTA, or Documented Original Tuskegee..

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What is the history of barometric pressure?

Italian astronomer Gasparo Berti and French scientist René Descartes also experimented with atmospheric pressure slightly before Torricelli's discovery, but they did not solve the problem. In 1646 Blaise Pascal and Pierre Petit replicated Torricelli's experiments. Pascal carried the experiments one step further by studying barometric measurements taken at various heights above sea level. The barometer showed lower numbers the higher it went, proving that air weighs less at higher altitudes.\nFurther experiments by Otto von Guericke resulted in the first air pump, which Robert Boyle ..

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