their numbers, they will owe much success. It will be thus that they will drive out other species, and garrison the globe. Such a race would naturally come to esteem fertility. It will seem profane not to.

   As time goes on, however, the advantage of numbers will end; and in their higher stages, large numbers will be a great drawback. The resources of a planet are limited, at each stage of the arts. Also, there is only a limited space on a planet. Yet it will come hard to them to think of ever checking their increase. They will bring more young into existence than they can either keep well or feed. The earth will be covered with them everywhere, as far as eye can see. North and south, east and west, there will always be simians huddling. Their cities will be far more distressing than cities of vermin,--for vermin are healthy and calm and successful in life.

   Ah, those masses of people--unintelligent, superstitious, uncivilized! What a dismal drain they will be on the race's strength! Not merely will they lessen its ultimate chance of achievement; their hardships will always distress and preoccupy minds,--fine, generous minds,--that might have done great things if free: that might have done something constructive at least, for their era, instead of being burned out attacking mere anodyne-problems.

   Nature will do what it can to lessen the strain, providing an appropriate remedy for their bad behavior in plagues. Many epochs will pass before the simians will learn or dare to control them--for they won't think they can, any more than they dare control propagation. They will reverently call their propagation and plagues "acts of God." When they get tired of reverence and stop their plagues, it will be too soon. Their inventiveness will be--as usual--ahead of their wisdom; and they will unfortunately end the good effects of plagues (as a check) before they are advanced enough to keep down their numbers themselves.

   Meanwhile, when, owing to the pressure of other desires, any group of primates does happen to become less prolific, they will feel ashamed, talk of race suicide, and call themselves decadent. And they will often be right: for though some regulation of the birth-rate is an obvious good, and its diminution often desirable in any planet's history, yet among simians it will be apt to come from second-rate motives. Greed, selfishness or fear-thoughts will be the incentives, the bribes. Contrivances, rather than continence, will be the method. How audacious, and how disconcerting to Nature, to baffle her thus! Even into her shrine they 

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