Why did the British exile criminals in those days?

Because this has a lot to do with population density, the denser the population, the more difficult it is for society to achieve public order. After Columbus discovered America, he brought back new species so that Europe could feed more people. The historical fact is that since then, the population of Britain has increased by a percentage. Britain is an island country, and its territory is that big. After the beginning of the industrial revolution, Britain was full of blood and violence during the period of capital expansion, and the huge social contradictions can be imagined, but the exile of criminals reached a relatively severe punishment (keeping criminals away from the mainstream society, you can't return for life), which effectively reduced the crime rate (we all know that it is difficult for a criminal to be truly accepted by society, and it is also difficult to integrate into society, not to mention that prisons with many criminals in Britain could not cope at that time). The second is immigration in disguise, which allowed the British colony to develop. Third, this measure of the British government is simple and effective, which saves a lot of administrative expenses, allowing the British authorities to focus more on developing colonial and capitalist markets, while reducing the risk of social unrest and avoiding riots and uprisings. Fourth, exile is more in line with the purpose of Christian fraternity than severe punishment. Isn't it good to give prisoners a chance (the historical fact is that many of the original talents in North America were Puritans exiled by Britain)? Fifthly, there is an example of China. During the Qianlong period, the population of China doubled, social contradictions intensified, and then a large-scale peasant uprising broke out, almost every dynasty. The contradiction between the founding of the People's Republic of China eased the economic development, and the population growth and social contradictions deepened the decline of the peasant uprising, which is almost an unchangeable historical cycle law. Sixth, I would like to ask the landlord, why do you think people commit crimes because society can't meet their strongest needs, or so many people take risks? During the period of capital expansion, social competition has been fierce. Can those who have committed crimes or are likely to commit crimes be recognized and satisfied under the circumstances at that time? Let this group of people move freely, doesn't it reduce the competitive pressure and avoid the crime risk for others in society?