One thing I am grateful for: Catholics at least don’t waste a lot of time on arguments about “scientific evidence for the the flood of Noah” and all that. My own inclination is to think that there is some kind of primordial traumatic flood at the back of the story, given the ubiquity of flood narratives in global culture. But I am highly skeptical the author of Genesis would find creationist (and atheist) fundamentalist quarrels about the historicity of the Flood narrative that interesting or pertinent to his central point. As far as he is concerned, his little corner of planet earth is “the world”. The main thing he cares about the is the meaning of the story.