No, it really hasn't. You like to refer to the "balance of nature", but this is not, as you seem to think, a nice, peaceful, harmonious process. It is, to use another term you are fond of misusing, dynamic. Creatures eat one another. Populations are, on the whole, kept in check by the availability of food, but there will always be variation in this. Temporary abundance of food will result in population explosions, but when the temporary abundance is exhausted as a result of the increased population the population will crash again, with many individuals starving. Everything is trying to survive and breed, but with no foresight, and certainly no idea of "harmony".