The reason the consent of all living parents is required for a Bahá'í marriage

Bahá'u'lláh has clearly stated the consent of all living parents is required for a Bahá'í marriage. This applies whether the parents are Bahá'ís or non-Bahá'ís, divorced for years or not. This great law He has laid down to strengthen the social fabric, to knit closer the ties of the home, to place a certain gratitude and respect in the hearts of children for those who have given them life and sent their souls out on the eternal journey towards their Creator. We Bahá'ís must realize that in present-day society the exact opposite process is taking place: young people care less and less for their parents' wishes, divorce is considered a natural right, and obtained on the flimsiest and most unwarrantable and shabby pretexts. People separated from each other, especially if one of them has had full custody of the children, are only too willing to belittle the importance of the partner in marriage also responsible as a parent for bringing those children into this world. The Bahá'ís must, through rigid adherence to the Bahá'í laws and teachings, combat these corrosive forces which are so rapidly destroying home life and the beauty of family relationships, and tearing down the moral structure of society. (From a letter written on behalf of Shoghi Effendi to a National Spiritual Assembly, 25 October 1947; The Compilation of Compilations, vol. I, Preserving Baha’i Marriages)