The fertility of the best is rapidly declining.
5.

The fertility of the worst is undisturbed.
6.

The policy of the State is inimical to the fertility of its best, and fosters the fertility of its worst citizens.
7.

The infertility of the best stock is due to voluntary curtailment of the family, through sexual self-restraint.
8.

No such-factor does or can obtain as a check to the fertility of the unfit.
9.