[ericathegreat]

Some input: The organism's environment.

Outcome should be: The organism successfully produces offspring

Natural selection is doing exactly what you describe.

[badrabbit]

Except natural selection can't start over. It onlu works if there are always a high rate of survivors and even if that was not an issue consider 4 billion years and a generous generation life of one year (natural selection cycle), 4 billion isn't a whole lot even for small features when you don't have an enormous population and birth rate. Let's say there were 100000 humans at some point and only a 1000 fatal features (being generous) it's not just the replacement rate of defective humans that needs to exceed the elimination rate, a certain percent of replacements must be free of all fatal defects and survive. Also, consider how there should be many failed species that attempted to evolve into a human like species or a primate. You can't always luck out, at some point the entire branch has to fail, requiring subsequent attmepts meanwhile the fatal conditions that required the evolution will not go away.

[KingMob]

> It onlu works if there are always a high rate of survivors

There doesn't have to be a high rate of survival if the reproductive rate compensates for losses.

E.g., if 80% of wild rabbits are eaten, but the remaining 20% can give birth to 5 bunnies per parent per lifetime, the population will be stable.

I have no idea where you're getting your beliefs, but most of it is wrong in both the math and biology.