Here it is, in context:
I suggest you read the whole thing.
We earlier discussed why marriage was created, but equally important were the factors that sustained the institution and kept it true to its objectives. The reasons that marriage 'worked' not too long ago were :
1) People married at the age of 20, and usually died by the age of 50. People were virgins at marriage, and women spent their 20s tending to 3 or more children. The wife retained her beauty 15 years into the marriage, and the lack of processed junk food kept her slim even after that. This is an entirely different psychological foundation than the present urban feminist norm of a woman marrying at the age of 34 after having had 10 or more prior sexual relationships, who then promptly emerges from her trim chrysalis in an event that can best be described as a fatocalypse.