Climate change and peak oil are by far the two most important issues for the rest of this century. They are completely intertwined and basically technological and scientific challenges that will require the worlds' industrial and social infrastructure to be overhauled.
Terra is not even on the map, of course. War will spring from a failure to deal effectively with climate change and peak oil.
Ergo this requires an American society and govt. that is completely focussed on technological and scientific upramping and investment. Gore knows this. I'm not sure if the Dem. candidates fully understand it.
And certainly the GOP anthropicenes who don't believe in evo-looshun ... well