Gall's Law is a rule of thumb for systems design from Gall's book Systemantics: How Systems Really Work and How They Fail. It states:
A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over with a working simple system.
The final step of "systems thinking" is the elimination of time itself. With real-time computers that are never shut down, all potentiality will be subject to management, choice, selection and intervention. The future will hold no surprises because it will be part of the present.
even when the underlying rules for a system are extremely simple, the behavior of the system as a whole can be essentially arbitrarily rich and complex.