Nothing is perfect but language is probably the only thing that has potential to be. Can not think of anything else that evolves in the same way; technology does not count, although that too, is a crucial part of our daily lives. Language would not exist without having something to articulate – which makes it proof enough that we can (that we are) evolving.
Spiral or 0, 1, 1, 2, 3, 5, 8, 13, 21, right?