Where was Thomas Malthus educated? Chapter 3 examines the overrun of the Roman empire by barbarians, due to population pressure. But an increased number of labourers receiving the same money-wages will necessarily, by their competition, increase the money-price of corn.
Difficulties of raising a family eventually reduce the rate of population growth, until the falling population again leads to higher real wages: "A circumstance which has, perhaps, more than any other, contributed to conceal this oscillation from common view, is the difference between the nominal and real price of labour.
Malthus' remarks on Godwin's work spans chapters 10 through 15 inclusive out of nineteen. And there was something to be said about that. Anonymously published. And if those don't start killing people, then all of these other things will, epidemics, pestilence, plague, and then famine.