What are the two main variables in Malthusian theory?

Population growth and means of human subsistence Population growth and agricultural decline Population growth and Industry Population growth and service sector

Population growth and means of human subsistence

Among the most famous theories of demography is the one associated with the English political economist Thomas Robert Malthus (1766-1834). Malthus’s theory of population growth – outlined in his Essay on Population (1798) – was rather pessimistic. He argued that human populations tend to grow at a much faster rate than the rate at which the means of human subsistence (especially food, but also clothing and other agriculture-based products)