Discuss the reasons for the growth and decline

Until the Second World War, imperialism was always an important part of civilization around the world. In all major world empires conquest and occupation of other lands stand out. Romans, Ottomans, Egyptians, Mongolians, Syrians, Greeks, Babylonians, Muslims, Persians and others have prospered by occupying other territories. However, as military warfare and technological progress, increased wages, prolonged war time, increased casualties, and people pursue racial diversity and strongly insist on heritage, the management of large amounts of land It will be difficult.

In the 18th century, population growth was faster than ever. There are four main reasons for this increase: reduced mortality, increased birthrate, actual elimination of terrible plague, and increased food supply. Because the English people are eating more healthy meals, the latter may be the most important reason for these reasons. In addition to the above, people can find countless reasons for population growth. Industry pays individuals more than village wages. This allows young people to get married early in life and give birth to children early. In the old apprenticeship system you can not marry an apprenticeship. Compared to the limited selection of several remote villages, urban life provides a more likely partner choice for young people.

In 1939, a famous economist Alvin Hansen discussed the decline of the population increase associated with the Great Depression. Clarence Barber, economist at Manitoba University, told the same idea in a journal article in 1978. Analyzing depression using "a form of Harold model", the hairdresser pointed out that in such a model people would look for the origin of major depression in the context of Harold's declining natural growth rate. Population and labor growth rate, as well as growth rate of productivity or technological progress was lower than guaranteed growth rate