At present the population of the world is increasing ... War so far has had no great effect on this increase ... I do not pretend that birth control is the only way in which population can be kept from increasing. There are others ... If a Black Death could be spread throughout the world once in every generation, survivors could procreate freely without making the world too full ... the state of affairs might be somewhat unpleasant, but what of it? Really high-minded people are indifferent to suffering, especially that of others.