The key to understanding earth history: The global flood
Over three chapters, the book of Genesis vividly describes a worldwide flood that began with the all the fountains of the great deep bursting forth, and the floodgates of heaven being opened.
The reality of Noah's Flood is the crux of the conflict between evolutionary and biblical world-views. If this global deluge really happened, then the millions of years of earth history and evolutionary progression supposedly seen in the fossil record are swept away. The Flood accounts for the major geological features and the vast majority of the fossil record. Indeed, the fossils themselves are a mute testimony to the truth of the Flood: we find billions of dead things, buried in rock layers, laid down by water, all over the earth—just what you would expect from the biblical account.
If Christians were to believe and effectively defend the biblical account of the Flood, then the basis for the evolutionary worldview would largely collapse. Many people would be saved from such a great pretension that sets itself up against the knowledge of God.