R1-R4 Strata.

Figure

R4  INSTITUTIONAL / SYMBOLIC
    collectively revisable
    sanction, category, record, procedure

R3  COGNITIVE / INTEGRATIVE
    partially revisable
    navigation, affect, simulation, governance

R2  BIOLOGICAL / METABOLIC
    non-revisable viability constraints
    closure, maintenance, morphogenesis

R1  FIELD / PRE-INDIVIDUAL
    metastable conditions
    gradients, incompatibilities, potentials

How to read it

The registers are not stacked as a ladder of worth. They mark different binding modalities. R1 is the field condition. R2 installs metabolic closure. R3 installs integrative governance. R4 installs symbolic and political enforcement. Each outer layer folds around the ones beneath it and can ultimately reach them.