The best part about this documentary is that it is extremely non-political, it just shares scientific fact and allows the reader to draw, or not to draw, and political conclusions. However, the truth of climate change and its impact on human societies is made very clear, as is the approaches the different societies took and the results of those approaches. He seems to be saying that modern society is extremely vulnerable to climate change, although he doesn't make any suggestions to what we might do to change that.
For me, as an AGW denier, one of his most interesting comments was that the both the Roman and Mayan empires began at a time when the world's climate was warmer than it is now. Although he didn't say so, my conclusion is that warmer climates are good for civilizations.
