It is a deeply unfortunate fact of life that the medical knowledge gained in the last 250 years has also been the cause of the world population growing from about 1 billion people to about 8 billion as now — with a further 3 billion to come in the next 35 years as middle-aged poor people around the world proceed into old age. Only then — around 2050 — is there likely to be a tailing off.
Already, half the population of the world is unable to eat an adequately nutritious diet. This will become immensely more serious in the next 35 years as the middle-aged hump mentioned above grows older but also as 0.5 billion Chinese people and perhaps as many Indian proceed to a better proteinaceous diet. This will require something like 10 times as much grain to be fed to farm animals and fish as now, so the total result will be a diminution of the present barely adequate diet of 0.5 billion people.
Ir will take at least 200 to 250 years for the world population and adequate food supply to get into pre-1750 balance again. Not a single growth economist has yet produced a model to show how this scenario can be avoided.