Why do Ex-British Colonies use Dollars Instead of Pounds? (Short Animated Documentary)

You'll notice that many ex-British Colonies, like Australia, Canada and New Zealand don't use pounds like their former British overlords but instead use dollars. Why? What caused these nations to switch currencies and why did they prefer America's style of currency of the Britain's? Find out in this video, the latest in my very short, animated historical documentaries (about history). Sources: The Sterling Area and Economic Disintegration by Catherine R. Schenk Gentlemanly Imperialism at Work: The Bank of England, Canada, and the Sterling Area, 1932-1936 by P. J. Cain Economic Policy and Economic Development in Australia from 1945: A Study in Economic Administration by Douglas Copland