Juan Enriquez calls himself an optimistic curmudgeon. I ask how he stays hopeful while politics looks broken, and he points to the other feed: scientific papers delivering Christmas every day.

We follow that optimism into optogenetics, Openwater’s open-source brain-imaging stack, the economics of medicine, and local AI. The point isn’t that our problems disappear. It’s that we have more agency than any generation before us—and now we have to use it.