For science evolution is a fact. It's beyond discussion its basic mechanisms although there could be discussion in particular areas of how evolution process really work.
You can believe in whatever you want. If you believe in the science reasoning, then you must read what Evolution really is and once you understand it, you will no longer ask why all apes haven't evolved and also you will get answers to a lot more questions. Although there is one thing that distinguish science from religion: If you can find an evidence that contradicts an established theory AND that theory cannot be extended to explain that new fact, then you can discard the old theory in favor of the new one. It has happened before and will happen again.