precisely the same view of the matter as I have here sought to set forth; prosperity is not civilization, its first tendency is to produce a reckless abandonment to the satisfaction of the crudest impulses. But as prosperity develops it begins to engender more complex ideals and higher standards; the inevitable result is a greater forethought and restraint.46
If we consider, not the marriage-rate, but the average age at marriage, and especially the age of the woman, which varies less than that of the man, the results, though harmonious, would not be quite the same. The general tendency as regards the age of girls at marriage is summed up by Ploss and Bartels, in their monumental work on Woman, in the statement: "It may be said in general that the age of girls at marriage is lower, the lower the stage of civilization is in the community to which they belong." 47 We thus see one reason why it is that, in an advanced stage of civilization, a high marriage-rate
is not necessarily associated with a high birth-rate. A large number of women who marry late may have fewer children than a smaller number who marry early.
We may see the real character of the restraints on fertility very well