Likewise for all cases of extinction, which represent well over 99 percent of species that ever lived. (This, by the way, poses an enormous problem for theories of intelligent design (ID). It doesn’t seem so intelligent to design millions of species that are destined to go extinct, and then replace them with other, similar species, most of which will also vanish. ID supporters have never addressed this difficulty.)
Let's start with where the 99% comes from. Currently, it's estimated that there are 8.7 million species on earth. So as far as I can tell to understand where this insane number came from, if you use evolutionary precepts and assume that the earth is billions of years old, and that creatures have been living and dying for that long, you would calculate that there are 100 times more species that must be in the ground somewhere.
So the starting assumption is false (at least only as supported by the "evidence" in this book so very weak at best). However, even if it were not, the world we live in is not the perfect creation God made it. It is the result of sin and the fall. Intelligent Design tries to focus on the science of life and the universe and how it fits the profile of design and not randomness. The movement isn't trying to answer religious questions about why something happened in history. However, Creationism is origin science with the Bible as its starting point. The Fall and the Flood as outlined in Genesis explains why God's creation is broken.

