What would that leave? Isn't all science non-theistic and materialistic? All Darwin's theory says is that no miracles are needed to explain the diversity of life; it says nothing about abiogenesis or theology, except that a literal reading of parts of Genesis is wrong. But astronomy and geology teach us the same thing.
There's a difference between non-theistic and atheistic. Evolution is atheistic. It is also not science. Note how the evolutionists never give any proof for their theory but just try violently to deny that any proof of any scientific theory is impossible.