I have said that this quarter of a million, this army of feeble-minded people, are propagating. They are propagating a progeny of feeble-minded at somewhere from two to six times as fast as the intelligent people are propagating their kind. That is another serious part of the problem. I should like to digress from my particular field for a moment to make a suggestion on the other side. It makes one feel pessimistic when we find that the good stock here in New England—the stock than which there is no better in the world—is gradually disappearing for lack of issue. Of one family after another one reads all too frequently, “The last of his family has passed away.” We are told sometimes that two children in a family are all that can be properly reared; that it is better to rear two children and rear them properly than to rear a larger family and rear them badly. If _two children in a family_ are all that our best and finest and nobler families can properly raise, _how many children_ ought to be raised in a family of these low-grade people? The average in the United States is, for all classes, something less than two, and the average for these defectives is from four to twelve. In that little family that we ran across down in New Jersey, which we call the Kallikaks, you will recall that the good side started from six ancestors. That is to say, Old Martin Kallikak, after he married, had seven children, one of whom died without marrying. From the six who lived and married, sprang all the normal descendants. Martin’s illegitimate son, the child of the feeble-minded girl, was the only one on the bad side, and yet to-day the number of descendants from the illegitimate mating is practically the same as the number descended from the six legitimate children. You can see that it does not take many generations for the progeny of the unrestrained feeble-minded to equal and even outstrip the normal. Our good stock is multiplying very slowly. Our poor stock—the lowest strata of society—multiplies in what might really be called a brutal ratio. If civilization is to advance, our best people must replenish the earth. I think it should be a part of our religion to replenish the world with good, clean people.