Most life is antagonistic to other forms of life. That is illogical if life was designed by a single, perfect, all-knowing creator. For example, why would God design something if He knew it was going to be unsuccessful (go extinct)? Why would God design his creation to be in constant conflict with itself?
There are two possible solutions:
1. The Wasted Theory
Of course, evolution solves the problem perfectly: adaptation, natural selection, etc.
For religious people, my "Wasted Theory" also solves the problem. You're welcome, religious people; and you may freely use my theory at your discretion.
DarkMatter2525's contribution to Intelligent Design: "The Wasted Theory".