What is Carl Marx theory of population?

Marx' view on population is that there is no problem such as overpopulation. His view was that the problem was caused due to capitalism, in that, capitalists facilitate the unequal distribution of food and resources. This is so because the capitalist(bourgeoisie) possess the concentration of the economy's wealth whilst the proletariat (working class) lives in poverty, which therefore results in reference to overpopulation.