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The reality of marriage as the union of a mother and a father is grounded in our very biology.

The urgency to mate persists in all people as in all other mammals because of the evolutionary drive to continue the species, the inborn imperative for genes to reproduce and hormonal differences that evolved over millions of years.

Marriage is built around complementarity of the sexes, and therefore the institution of marriage is a support for stable families and societies.

Marriage is a core institution of societies throughout the world and throughout history. It's something that has provided permanence and stability for our very social structure.

In the evolution of mankind there has always been a certain degree of social coherence.

Through the evolutionary process, those who are able to engage in social cooperation of various sorts do better in survival and reproduction.

Sexual relations, of course, have existed, exist, and will exist. However, this is in no way connected with the indispensability of the existence of the family.

Growing up human is uniquely a matter of social relations rather than biology. What we learn from connections within the family takes the place of instincts that program the behavior of animals; which raises the question, how good are these connections?

Offspring, the due performance on religious rites, faithful service, highest conjugal happiness and heavenly bliss for the ancestors and oneself, depend on one's wife alone.

The marriage of a man and woman is the most enduring human institution, honored in all cultures and by every religious faith. It's in this institution that children are meant to be nurtured. We know this after thousands of years of human experience.