Logically the Neo-Pagan should get rid of the institution of marriage altogether; but the very nature of human society, which is built up of cells each of which is a family, and the very nature of human generation, forbid such an extreme. Children must be brought up and acknowledged and sheltered, and the very nature of human affection, whereby there is the bond of affection between the parent and the child, and the child is not of one parent but of both, will compel the Neo-Pagan to modify what might be his logical conclusion of free love and support some simulacrum of the institution of marriage.

Ch. V New Arrivals - Survivals and New Arrivals (1929)