Indeed, here we learn of when POLYGAMY began, which it did not with God's people, but through those of the way of Cain! This is a VERY interesting segment of the Soteriology series (Soteriology: Doctrine of Salvation (Soteriology series Full List) and very much worth viewing!
"As man is appointed mortal sorrow, the blessed God shall come down to initiate and teach that his death shall bring the despairing rest and comfort!"
Across the Flood
by Pastor Tom Bruscha