The Last Hours of Ancient Sunlight, by Thom Hartmann
Anthropology, philosophy, spirituality, ecology… Where does this book get filed? The keyword on the upper left corner of the back cover says Current Affairs. I guess those are current affairs; I guess it’s high time they were.
I actually bought this book after hearing Hartmann speak at Bioneers in 2006, impressed by his reasoned (intellectual) and grounded (spiritual/emotional) presence on stage. But I never got around to cracking it until I realized it might inform my current researches for Van Jones’ book on Green Collar Jobs.
Hartmann’s first goal is to explain how humanity exceeded natural carrying capacity on earth. For most of human existence, alongside every other living creature, we lived off what he calls “current local sunlight,” the amount of sun that hit the earth and got stored in plants, which fed the herbivores, which in turn fed the carnivores. Human shelter and clothing were derived from plants and animal parts too, and thus also from sunlight.
Population densities stabilized at the level which local sunlight could sustain, growing slightly when we developed herding and farming practices, which more efficiently converted sunlight into food.
Then we discovered what he calls “ancient sunlight:” coal, a material derived from plants that had stored sunlight for hundreds of millions of years. As coal replaced wood as a main source of heat, forests in turn could be cleared for food production, and global population jumped: from 500 million people around 1000 A.D. to one billion in 1800. And then we discovered another form of ancient sunlight: oil.
So while it took us 200,000 years to produce our first billion people, with the discovery of oil, it took just 130 years for our second billion, and a paltry 30 years for our third billion. Then, leveling off from exponentials into more linear growth—14 more years until we hit 4 billion, 13 more years to 5 billion, and 12 additional years to hit 6 billion in 1999. And growing.
And now there’s almost no more ancient sunlight left. Experts differ on the exact amounts remaining, but everyone is clear we’ll be totally OUT within the next 40-60ish years at current rates of usage– and increased use is predicted. Since demand and population is still growing, and since even our alterative energy technologies require oil (to produce photovoltaic cells, for example), and since we’re running out of all sorts of other things (water, metals, trees) we obviously need to Get Smart now.
Then Hartmann switches tacks entirely, in order to introduce us to the people who may hold the answer to effective resource management: the Older Cultures, such as the San, Kogi, Ik, Kayapo. He spends a lot of time debunking our Younger Culture’s prevailing narratives about these primitive peoples, and questioning our Younger/Dominant Cultural values. What is enough? What is wealth? What is growth? Who really attains leisure or contentment? Whose culture is deeper?
There are so many gems in this book that my copy is riddled with dog-eared pages, underlined passages, asterisks and exclamation points. There are far too many to convey here, so I’m just going to ask very nicely—maybe even beg you—to read the book yourself, and believe what he conveys about transformation rippling from the individual to the community to the global level, and how individual acts of grace, generosity, and gratitude can change humanity’s trajectory.



