A narrative. One main story in our Parshat Noach is about the dispersion of people around the world, against their will. The other main story is about interbreeding events with "people" they met, which produced Gibborim. It is exactly these events that lately receive quite some attention in academic circles: the encounters, some 40,000 to 50,000 years ago, with archaic man (the Neanderthals and the Denisovans), and the critical evolutionary influence which these encounters have had.
The Sin of Adam and Chavah was therefore in the relations of original man with archaic women. Or, it was Adam who was an archaic man and Chavah a normal human. The archaic man had ultimately no male descendants. His fate was like the fate of Kain: כִּי אִישׁ הָרַגְתִּי לְפִצְעִי. Anyway, the mix of the two "human" species was only just viable, and it caused many genetic problems in their offspring, as it says: בְּעֶצֶב, תֵּלְדִי בָנִים.
It was a forbidden act, the relations with a different species, but it became allowed, because it bore fruit, the forbidden fruit, and advantages ensued, as it says: וִהְיִיתֶם, כֵּאלֹהִים, יֹדְעֵי, טוֹב וָרָע.
Were would the relations have happened? In the land of Israel, at the border with Africa, as testified by the priest of Shalem, as it says: וְהוּא כֹהֵן, לְאֵל עֶלְיוֹן. And how long ago did the relations happen? It is written: דָּבָר צִוָּה, לְאֶלֶף דּוֹר. He commanded "a thing," causing it to happen, and it happened, a thousand generations ago.
You see, the story of the Gibborim is the immediate consequence of the story of Adam and Chavah. They gave birth tם the "sons of God," who gave birth to the "Gibborim."
And the main story of Parshat Noach, the birth of Shemites, Canaanites, et al., took place about 20,000 years ago. And Avraham, Yitzchak, and Yaakov, were Shemites, perhaps early Shemites, Gibborim, that lived long lives.
And it is a narrative.
