TWENTY men working together will, where nature is niggardly, produce more than twenty times the wealth that one man can produce where nature is most bountiful. The denser the population the more minute becomes the subdivision of labor, the greater the economies of production and distribution, and, hence, the very reverse of the Malthusian doctrine is true; and, within the limits in which we have any reason to suppose increase would still go on, in any given state of civilization a greater number of people can produce a larger proportionate amount of wealth and more fully supply their wants, than can a smaller number. —Progress & Poverty — Book II, Chapter 4: Population and Subsistence: Disproof of the Malthusian Theory

Twenty people working together, even where nature is scant, can produce more than twenty times the wealth one person can produce where nature is bountiful. The denser the population, the finer the division of labor, and the greater the economies of production and distribution.

Thus we see that the very reverse of Malthusian doctrine is true. In any given state of civilization, a greater number of people can produce a larger proportionate amount of wealth than can a smaller number.

Bob Drake’s abridgement, at Chapter 9: Malthusian Theory Disproved.