Although the educated man is perfectible, the poor man is unable to recognize the need for both natural and preventative checks which prevent an unstable ratio between a population and its resources. Malthus believes that humanity is reproducing at such a rapid rate that it will eventually outgrow its resources. He believes that the poor are the source of the problem, because they cannot control themselves and have too many children. This results in them living beyond their means. Malthus says that natural and preventative checks should be used to control the population. Natural checks are thing like war, famine, and natural disasters that decrease the population. Preventative checks are measures that should be taken by the government to make sure people don't have too many children. Malthus also believes that you should live within your means. Poor people have less money to support a family, so they should have fewer children. Rich people have more money to support a family, so they could have more children.