"Final cause" doesn't imply a designer; it's just the way the species happens to exist. (Aristotle was a deist, roughly speaking.) There's no guarantee that a s

"Final cause" doesn't imply a designer; it's just the way the species happens to exist. (Aristotle was a deist, roughly speaking.) There's no guarantee that a species' final cause doesn't involve messing with other species'. There's also no guarantee that a species' final cause isn't self-defeating. Introduce a pair of rabbits to an island with no natural predators of rabbits, and in about ten years the rabbits will eat all the vegetation of the island and then starve to death...