The proportion of illegitimate births to the total births is now over 20 per cent, so that to every four legitimate children there is rather more than one illegitimate child. It may be said that this is merely due to an increasing proportion of unmarried women. That, however, is not the case. The marriage-rate is on the whole rising, and the average age of women at marriage is becoming lower rather than higher. Grünspan considers that this increase in illegitimacy is likely to continue, and he is inclined to attribute it less to economic than to social-psychological causes.
I have discussed this point in Studies in the Psychology of Sex, Vol. VI, "Sex in Relation to Society," chap. xii.
It is remarkable that in early times in Spain the laws recognized concubinage (barragania) as almost equal to marriage, and as conferring equal rights on the child, even on the sons of the clergy, who could thus inherit from their fathers by right of the privileges accorded to the concubine or barragana. Barragania, however, was not real marriage, and in many regions it could be contracted by married men (R. Altamira, Historia de España y de la Civilazacion Española, Vol. I, pp. 644 et seq.).