Latter his father Adam gave birth to other sons and daughters and the first was Seth who replaced Abel. Cain genealogy was cut off being the descendants of the Sabbath Adam from the bible although a brief genealogy was included in Genesis 4 to 6 and the descendant of Seth was used and Jesus Christ was a descendant of Seth.
Since Cain was a descendant of the Sabbath Adam, whom God protected by giving him his mark on his forehead, he did not cut off his descendants forever who later multiplied and filled the new world of Noah after the great flood including the male and female of the first Adams God created before he created the Sabbath Adam but were not included in the genealogy of the Sabbath Adam after the flood based on the biblical record. So it appears as though only the descendants of Seth which is Noah and his family which consists of eight souls were the only people to multiply and filled the whole earth after the great flood. Moreso, Babylon too has their own history of the flood too similar to that of Noah's record in the bible.
In-as-much as Babylon is the land of Abraham and on whose site the tower of Babel was built as the world first headquarters, her history of the flood and survival may be similar to Noah that throw some lights on how the Babylonians were saved and how they too populated their communities being the original land of Abraham. American Soldiers handed over UR former home of Abraham to Iraq Government according news report. So UR is still existing in Iraq the home town of Abraham.
Moreso, if Noah and his family populated the world, then there was no need to discover America and other parts of the world by the explorers. Trading relationship would have continued among nations and knowing each other location on earth before Mongo Park, Christopher Columbus and others explorers arrived to tell us the exact locations our brothers were living in other parts of earth. More evidently, the spices of birds and other animals different from one region of the world to another.
So the spices in the Middle East are different from those in other parts of the world. Noah only saved those spices of his immediate community(ies) in the middle east while other spices in other parts of the world were saved too by others that survived the great flood. Therefore, the pre-Islamic religion started right from the time of Adam to the time of Abraham which continued after the flood as so many of them were saved because they obeyed the voice of the angels who had warned them of the destruction of the world who they called "the gods" or "oracles". So they prepared themselves against the disaster by building boats, other raised high trees far above the earth like the Red Indian of America based on their history about the flood of Noah.
God instructed Noah to create an Ark and take in male and female both the unclean and the clean(Genesis 7:7-10) Therefore, since God was not interested to destroy all the unclean but saved them male and female so he also saved the descendants of Cain and those of the first Adams whom he uses to re-populate the new world after the flood and were saved in the other part of the world unknown to Noah and his family.
Prophet Elijah did not know that God had preserved seven thousand souls in Israel who had not bow to Baal but he taught he was the only righteous man as at then ( 1 Kings 1913-18). Apostle Peter thought that the Jews were the only people to receive the baptism of the holy sprit but was surprised that Colenius and the gentile too receive the Holy Spirit baptism therefore he said, truly, I perceive that God shows not partiality but in every nation and everyone who fears him and does what he likes is acceptable unto him (Acts chapter 10). Moses taught he was the only prophet at his time but was surprised to see Balaam in the land of the Median who was a great prophet and was asked to curse Israel but he blessed them instead.
Similarly in the end-time, Seth descendants are to be judged by the saints sitting on thrones, the sinners facing eternal punishment in the lake of fire while the righteous ones were rejoicing in the kingdom of God for 1000 years forming the camp of the saints, yet there were another set of people known as Gog and Magog nations who were not affected by the judgment of the saints of Seth although they were being ruled by the government of the saints with a rod of iron to whom the devil later went and deceive in order to resist the laws of the saints as soon as he was released from the prison who ganged up with him and their number is as the sand of the sea shore living in the four corners of the earth. They came and encamped the saints but fire from heaven consumed them according to the book or Revelation chapter 20.
Then in that battle Satan was captured and was throne into the lake of fire burring with brimstone where the false prophet and the antichrist were thrown( Rev. 20:1-end).
Therefore the battle of Gog and Magog is the battle between the descendants of Cain the evil seed and the first Adams and the descendants of Seth of the righteous seed just as it was from the beginning. So in the same manner the Lord will reserved the descendants of Cain and the first Adams for the end-time battle against the saints just as he killed his brother Abel.
Therefore Jesus said, the blood of Abel will be demanded in this generation and said the Devil (referring to Cain) was a murderer from the beginning. Therefore, the Devil represents Cain who shall be empowered to fight the Saints of Seth in the end-times known as the battle of Gog and Magog before his final destruction. They now represent the first Adams that lived outside the Garden of Eden to who Cain went and associated with as it was written in book of Genesis. The same event will repeat in the end-time as recorded in the book of Genesis. Therefore Jesus said to Apostle John that the book of Revelation is about things of the past, present and future,
Now as the vision of Gog and Magog was shown to me from the scroll, I began to carry out my research and got in touch with some encyclopedias including Halley bible commentary which also stated that, certain families of the earth were saved during the great flood and each nations or tribes of those family has their own version of the flood history similar to the one written by Moses in the book of Genesis.
For example the Chinese also has their version of the flood which sated that a certain man who was informed by the gods before the flood, took his family in a boat to a distant land for safety. The Red Indians of American has their own version of the flood. The Babylonians also have their own record of the flood in a similar manner from which their ancestors were saved from the great flood and many more. Check through the encyclopedia and bible commentaries for more details.
However those nations who shall wage war against the camps of the saints will face the White Throne Judgment and shall be thrown into the lake of fire before the new heaven and the new earth will be created in which there will be nothing unclean and the new Jerusalem shall descend from heaven and land in Israel, the very location of the Garden of Eden as it was in the days of old. "