Fair enough. But why quibble over a couple of years? The point is that the amount of division we have going on now isn't unprecedented. Lots of people have the last time in their living memory.
Another example would be the ozone layer: When it became clear in the 70s that CFCs were destroying the ozone layer we were able to make changes to stop that from happening over the course of a decade. Can't imagine us being able to do something like that now.
I agree, now that "corporations are people" in the US it's hard to imagine being able to successfully battle them and force large-scale, cross-industry environmental-health measures to be taken. That is, unless it so happens that such measures maximize short-term profits in some way.