Regulatory architectures comprise the agents and processes responsible for system persistence. These architectures are composed of code and regulators: the code stores the programs of regulatory function, while the regulators are the agents that carry out the encoded programs. Regulatory architectures exist across all scales of biological systems and therefore life, from proteins in the simplest bacteria to the bureaucracies that govern societies.

Inside cells, transcription factors act to coordinate gene expression, leading to distinct expression states and cell types. In multicellular organisms, brains and nervous systems coordinate organs and appendages to achieve desired physiological outcomes. In society, laws passed from centralized institutions—from the laws of sport to legal codes—ensure that people interact in fair, useful, and respectful ways, resulting in institutional success.

Regulation is a cost—paid in cellular resources, metabolic energy, administrative labor, or taxpayer dollars—but enables systems to maintain coordinated function despite internal and external perturbations. To regulate is to facilitate stability and robustness, allowing a complex system to persist.