Towards more knowledge and less superstition. What facts show we devolve? Except for religious fundamentalism. Can you provide a source for brain size claim?
Believing in the Bible literally and thinking that evolution is a hoax and that everyone else is deceived by the Devil - that makes you a fundamentalist.
The difference between you and ISIS fundamentalists is that you are peaceful and educated. Your worldview is very similar to their.

Defining aspect of evolution, as I see it, is gradual perfecting of lifeforms. One comes after the other, improved. Descendants come after their ancestors. However, it isn't always the case that the newer lifeform is more advanced. Evolution leads to many blind alleys.
Genetics shows the common origin of all lifeforms. Our genome shows our kinship to all lifeforms.

Do you know that feeling when you are somewhere between the waking state and falling asleep? You are on your bed and suddenly you twitch like you were falling somewhere? Our ancestors were sleeping on trees. Guess what can happen if you fall asleep on a tree? You can fall down. This memory is still embedded in our genes and consciousness.