In 1758, Rev. Otto Diederich Lutken, Rector of a parish on the Danish island of Fyn, summed up the whole issue in this single beautifully understated sentence-

‘Since the circumference of the globe is given and does not expand with the increased number of its inhabitants, and as travel to other planets thought to be inhabitable has not yet been invented; since the earth’s fertility cannot be extended beyond a given point, and since human nature will presumably remain unchanged, so that a given number will hereafter require the same quantity of the fruits of the earth for their support as now, and as their rations cannot be arbitrarily reduced, it follows that the proposition “that the world’s inhabitants will be happier, the greater their number” cannot be maintained, for as soon as the number exceeds that which our planet with all its wealth of land and water can support, they must needs starve one another out, not to mention other necessarily attendant inconveniences’ 

Roger Plenty, Nailsworth