Genesis contains a detailed genealogy that traces the development of the human race from Adam to Abraham and beyond. The genealogy includes a chronology that records the exact ages of individuals at the birth of their children and at their own death.
The Bible’s genealogies have more than one function, but they provide a connecting link to the earliest days of humanity and are invaluable dating devices. More pertinent to our discussion, they help us determine the age of the earth. The bottom line is that man has been on the earth since the beginning, a beginning Scripture dates around 4,000 B.C. Hard to believe? Check out how John explains it…
Now that you’ve heard John MacArthur's explanation, think about this: What do we stand to gain from the detailed genealogies of Genesis 1-11? (Remember, Matthew and Luke record portions of those genealogies in the New Testament.)