18. Charles Townsend: The Pioneer of English agricultural improvement he learned techniques for the Dutch while he was an ambassador and used them in his latter years to produce large crops. This would help England in the long world since the Agricultural Revolution would lead to the Industrial Revolution.
19. Thomas Malthus: He wrote Essay on Principle of Population argued that population would always grow faster than food supply. He took the view that war, famine, and disease were "positive checks" and the only way of warding them of was young men and women have "prudential restraint" by marrying at older ages.
20. David Ricardo: He went along with Malthus's pessimistic assertion of population and came up with "Iron law of wages". He said that because of the pressures of population growth wages would always sink to subsistence levels.
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