Well better probably includes safer and cleaner.
I don't think the world can be 'perfect' assuming we could find a consensus on 'perfect'.
The world/nature/universe is inherently 'changing and dynamic'. Our challenge it to adapt.
The world is never-ending. Our compatiblity with the world is what we must address.
As for a non-evil world - one can simply set a good example and 'do the right thing'.