Have faith
We're almost there. It's kind of like when you first discover alcohol. You don't know how far your "too far" is until you've been there praying to the porcelain god. ;) Then you know how far is too far.
As for the human species on this planet, yes, it can seem to take forever and we do seem to be repeating the same mistakes and learning very little from them, but have faith, we're almost at "too far".
I feel the same way. I just read a depressing article on the Koyota Protocal and was reminded of how ignorant some of our world leaders were, those who refused to agree to the movement. It seems like there are so many people willing to make change, and yet our politicians, the ones who hold power, are not.