Foehammer. Every animal fights nature. The survival instinct has evolved to be very strong. Every Wildebeeste strives not to be the one eaten by crocodiles, even if it is the weakest or sickest in the herd. With luck, it survives, and the croc eats a different wildebeest.
We don't worship or try to further evolution. Evolution has no goals.
We can, as a matter of fact, argue that our ability to think about diseases and invent medicines to cure them is a direct result of our having evolved big brains. But taking medicine isn't new and isn't confined to humans, either. Chimps and monkeys eat different leaves and herbs to aid digestive upsets. Cats will eat various grasses which are known vermicides.
Nobody 'decides' a mutation is beneficial or not. It may become evident, one way or the other. Most of the time, mutations go completely un-noticed, as they don't have much of an effect on the organism for good or ill.
You would be able to present better arguments if you actually read a few good books on the subject. Would you respect my arguments about the gospels if you could tell I hadn't bothered to read and try to understand them?
