I've been thinking a lot about the tremendous value of salutary feedback systems: how vitally important they are to human flourishing and to getting us out of bad situations where we'd otherwise become stuck. A feedback mechanism is anything that course-corrects when inputs indicate something's not right. Much of the sad state we're in seems to be the result of inadequate or severed feedback loops. Unaccountable systems end in persistent failure. Our neurobiology is built on feedback loops. Motor control circuits work like servo controllers -- targeting a desired outcome, checking results, and adjusting motor control impulses, iteratively, in real time. The immune systems that keep us healthy are similarly feedback-based.