In my book, Identity - Lost in the Tears of Cretins, there is a three chapter series dedicated to the lineage of Cain. I prove that he and Esau are both the forefathers of the Caucasoid (white) races today.
Outside of some genealogical facts, I go into the book of Ecclesiastics, which explains how "nothing new under the sun" pertains to the spirits of men. We all repeat the work of the generations that preceded us, however, the flesh doesn't allow us to remember.
ex: John the Baptist was Prophet Elijah, though he denied it in John 1:21 Jesus confirmed it in Matthew 11:12-15.
ex: Jesus was Adam according to 1st Corinthians 15:45.
We all know that Cain was a tiller of the land. The Bible hints that he was an expert botanist when he offered his crops as a sacrifice to God. Cain knew how to manipulate vegetation to his will; so as he inherited the earth's throne from the Garden of Eden (where he was driven after he murdered his brother) he began to influence the various civilizations of the earth with his teachings. There was a documentary done on the drugs found in Ancient Egyptian Mummy tombs. Cocaine was the most prevalent, and it's no coincidence that the word cocaine broken down means - WITH CAIN.
Now just as the brother Wesley Muhammad is teaching in the video above, we can see that there's nothing new under the sun, because Cain's Caucasoid descendants are continuing his work against God's people today.