In the simplicity of his words,
the author of Genesis described
the institution of
human society.
Genesis 2:18-24
The Lord God said: "It is not good for the man to be
alone. I will make a suitable partner for him." ...
So the
Lord God cast a deep sleep on the man, and while he
was asleep, he took out one of his ribs and closed up its
place with flesh. The Lord God then built up into a woman
the rib that he had taken from the man. When he brought
her to the man, the man said: "This one, at last, is
bone
of my bones and flesh of my flesh; This one shall be
called 'woman,' for out of 'her man' this one has been
taken." That is why a man leaves his father and
mother
and clings to his wife, and the two of them become
one body.