Had population and food increased in the same ratio, it is probable that man might never have emerged from the savage state.
Thomas MalthusNo move towards the extinction of the passion between the sexes has taken place in the five or six thousand years that the world has existed.
Thomas MalthusThe immediate cause of the increase of population is the excess of the births above deaths; and the rate of increase, or the period of doubling, depends upon the proportion which the excess of the births above the deaths bears to the population.
Thomas Malthus