We already spoke about this here.
Quoting Bertrand Russell in 1923:
“Socialism, especially international socialism, is only possible as a stable system if the population is stationary or nearly so. A slow increase might be coped with by improvements in agricultural methods, but a rapid increase must in the end reduce the whole population to penury, and would be almost certain to cause wars.”
Bertrand Russell, The Prospects of Industrial Civilization, 2nd ed. (London: George Allen & Unwin, [1923] 1959), p. 273.
(Found in “Boundaries and Dominion: Leviticus” vol. 4 by Gary North p. 1644.)