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White settlers marched further westward towards the Pacific, inspired by the concept of Manifest Destiny, which believed that European Americans were divinely destined to occupy the whole North American continent. As they did so, they increasingly clashed with Native American Indians for land and natural resources, particularly when the discovery of gold in western regions triggered the Gold Rush. Prospective gold miners flocked to the Rocky Mountains and Pacific Northwest, fighting – often violently – with the Native Americans they met.
American System: the policy of promoting industry in the U.S. by adoption of a high protective tariff and of developing internal improvements by the federal government (as advocated by Henry Clay from 1816 to 1828).
Monroe Doctrine: a statement of United States foreign policy expressing opposition to extension of European control or influence in the western hemisphere.
because theres more people there to vote
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World War II was the deadliest military conflict in history. It lasted from 1939 to 1945 and involved 30 countries from every part of the globe. World War II killed around 70 million people or 4% of the world's population. Historians argue over the exact numbers, so most of the following figures are from "The Fallen of World War II." It's more than the deaths incurred for all wars since then combined.
The United Nations was founded in 1945 to prevent another conflict with the horrific consequences of World War II. A controversial organization from the start, the UN has nonetheless encouraged disarmament, promoted human rights, fought poverty, and worked to promote peace worldwide. Its pursuit of stability and global humanitarian efforts also led to the World Health Organization. WHO was formed thanks to a declaration that emerged from that first meeting of the UN, setting the control of malaria, tuberculosis, and sexually transmitted diseases as its initial priorities. (this is the best I know about WWII sorry if it doesnt help)
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