Per Spinoza

The human mind is not simply an instrument of conscious cognition that can be detached from its organic base. It is a locus of feeling, conscious and unconscious, flowing directly from a somatic foundation.... Where humans differ most from other animals may be in our capacity and need for illusion.

John Gray, The Mind’s Body Problem (NYRB, December 2, 2021)

Ecology and evolution are deeply intertwined. Just as the death and decay of organisms provide raw materials for subsequent generations, so too the deaths of species spawn new possibilities for future generations of species. Without extinction, there would be insufficient ecological space for evolution to explore alternative solutions and diversify into new life forms. When initially faced with some change to their native environments, species don’t grimly stay put and evolve into new forms better suited to the transformed conditions. They move, tracking the old habitat. In general, it’s only when the old habitat disappears that species are forced to adapt or die. Mass extinctions—the dying off of multiple, distantly-related lineages over vast areas in a short span of time—occur when one or more external forces wipe out a range of habitats, cutting off opportunities for tracking habitats.  Over the past half-billion  years, there have been five major mass extinctions, with the dinosaurs wiped out in the most recent of these. We now face the sixth mass extinction, which threatens to tear apart the fabric of the biosphere, with drastic consequences for most life on this planet, including us. In better times, species losses tick along at a barely discernable rate—perhaps one every five years. At present, somewhere between 50 and 150 species disappear every day, never to be seen again.... This time around, a single species—Homo sapiens—has become the external force driving the decimation of millions of other species. Yes, we are the asteroid now colliding with the planet. 


Scott D. Sampson, Dismiss dinosaurs as failures...and pave a path to a bleak future

In essence, the planet runs on a cycle of water-splitting by photosynthesis to form oxygen and the production of water by respiration.

Paul G. Falkowski in Life's Engines:  How Microbes Made Earth Habitable

If I calculate the average annual quota required to limit global warming to two degrees this century I find that simply maintaining a typical American single-family home exceeds it in two weeks. Absent any indication of direct harm, what makes intuitive moral sense is to live the life I was given, be a good citizen, be kind to the people near me, and conserve as well as I reasonably can.... [Climate change] deeply confuses the human brain, which evolved to focus on the present, not the far future, and on readily perceivable movements, not slow and probabilistic developments.

Jonathan Franzen, "Carbon Capture: Has climate change made it harder for people to care about conservation?" in the New Yorker of April 6, 2015