If you read the writings of Russian born and educated Pitirim Sorokin, the founder of Sociology at Harvard University, you will find that his view of a sustainable society was due to the regulation of sexuality as the essential first mark of civilization. Exactly, and according to Sorokin, civilization is possible only when marriage is normative and sexual conduct is censured outside of the marital relationship. Furthermore, Sorokin traced the rise and fall of civilizations and concluded that the weakening of marriage between a man and a woman was a first sign of civilizational collapse.
It is not surprising to me as a Christian Sociologist to read this and understand the importance of it. Even if I were not a Christian, just by reviewing histories of fallen societies, I 'we' can notice that whenever sexual deviation from the norm (normal as we find in set down by nature) societal collapse is not far behind.
There is such thing, even in nature for anyone who is a follower of Darwin, as gender complementarity. It means that each gender, as in physical sexual distinction between male - female, has certain properties within its gendered physical boundaries. A man is different from a woman in many ways and we can say the same about women being different from men in many ways: physically, mentally, emotionally, hormonally, socially and even philosophically. A man provides for society in a way that a woman cannot and visa versa.
God's design for marriage, follows nature. After all, it too was created by God.
It is unwise to think that marriage of any other kind is Ok with God and His design for us!
Is this a time to be concerned about given the political correctness in today's post-modern America? Yes, especially for Christians.
Read Luke 17:28 "And the world will be as it was in the days of Lot. People went about their daily business, eating and drinking, buying and selling, farming and building until the morning Lot left Sodom. Look around ~ there is much of Sodom to see thesedays.
Scripture pertaining to marriage...
* 1 Corinthians 7 ~ Marriage
* 1 Peter 3 ~ Wives and Husbands
* Romans 7 ~ An Illustration from Marriage
* Ephesians 5:22 ~ Wives and Husbands
* Colossians 3:18 ~ Rules for Christian Households
* Mark 10:6 ~ Divorce "In the beginning God made them male and female"