Comment by TeMPOraL

> Because what am I, if not a self-organizing collective of a trillion cells. That seems like feedback which scales right there.

You're not, not in this sense. There is no body-wide feedback at all at the cellular level, any single cell is disposable and nothing will notice if it dies. Any meaningful feedback exists between and within functional units of the body.

There is, however, the other, original form of feedback that allows the body to exist - the one that allows you to not have this commonly understood "feedback" in the first place. That is, feedback loops, the control theory concept of systems that self-stabilize or self-amplify. This, not some top-level control, is what's keeping the body together.

The body is a perfect example of a naturally hierarchical system. Society is another. That's what scales.