TheOldHippie : ... I happen to believe in the flood story - but not that it was global. Huge and quite possibly having worldwide effects, but the flood itself local. There was not enough time for human or animal population to spread as fast as it must have in order to be as plentiful as it must have been during the days of Abraham etc.
Of course, floods are part of the real life and the mythical life of various situations. The flood myths invariably come from societies that live in river valleys, that's why the myth from which the biblical flood myth is most likely derived comes from the Tigris-Euphrates river system. If you've never heard of the Epic of Gilgamesh, you can find a reasonable discussion in the Wikipedia at https://en.wikipedia.org/wiki/Epic_of_Gilgamesh.
Much of the mythical account has been preserved on clay tablets that archeaologists have discovered. This image shows what they look like.
The first half of the story discusses Gilgamesh, king of Uruk, and Enkidu, a wild man created by the gods to stop Gilgamesh from oppressing the people of Uruk. After an initial fight, Gilgamesh and Enkidu become close friends (or lovers, according to some). Together, they journey to the Cedar Mountain and defeat Humbaba, its monstrous guardian. Later they kill the Bull of Heaven, which the goddess Ishtar sends to punish Gilgamesh for spurning her advances. As a punishment for these actions, the gods sentence Enkidu to death.
In the second half of the epic, distress about Enkidu's death causes Gilgamesh to undertake a long and perilous journey to discover the secret of eternal life. He eventually learns that "Life, which you look for, you will never find. For when the gods created man, they let death be his share, and life withheld in their own hands". However, because of his great building projects, his account of Siduri's advice, and what the immortal man Utnapishtim told him about the Great Flood, Gilgamesh's fame survived his death.