If Bishop James Ussher’s calculations taken from dates given in Scripture are correct, man has been on earth for about six thousand years. The date he gave is 4004 B.C.
The framework of this post comes from a book titled, “The Timetables of History”, by Bernard Grun, published by Simon and Schuster. Some of this framework has been fleshed out to help the reader understand the content easier.
The above book quotes Henry David Thoreau (whom they refer to as an American philosopher-idler) as saying: “Time is but the stream I go fishing in.”