I agree, this post is very nice!
I was about to shoot a comment along the same lines of yours, concerning the dates. But you were first. ^^ The actual problem consists of the changes induced by humans, as you said, which thus focus on a smaller time scale. :)
I agree there are nature's automated changes to climate since the inception of the earth, the focus here is the human-induced changes that serve to disrupt the automation. The consequences might be more disastrous in the long run.