Demographic Theories. Sociologists have long looked at population issues as central to understanding human interactions. Below we will look at four theories about population that inform sociological thought: Malthusian, zero population growth, cornucopian, and demographic transition theories.Click to see full answer. Consequently, what is demography theory?Theory of Demographic Transition is a theory that throws light on changes in birth rate and death rate and consequently on the growth-rate of population. The relationship between birth and death rates changes with economic development and a country has to pass through different stages of population growth.Beside above, what is the theory of Malthus? The Malthusian Theory of Population is a theory of exponential population growth and arithmetic food supply growth. Thomas Robert Malthus, an English cleric, and scholar, published this theory in his 1798 writings, An Essay on the Principle of Population. These checks would lead to the Malthusian catastrophe. In this regard, what are the theories of population growth? Malthusian Theory of Population Growth – This theory states that population grows exponentially, thus out-growing a society’s resources. Preventive Checks – Preventive checks are those ways in which nature may alter population changes like moral restraint (postponing marriage) or ‘immoral ways’ (birth control).What is Cornucopian theory?A cornucopian is a futurist who believes that continued progress and provision of material items for mankind can be met by similarly continued advances in technology. Fundamentally they believe that there is enough matter and energy on the Earth to provide for the population of the world.