If the subsystem has a positive impact on the supersystem production of services, however little, this will increase the integrity and the survival value of the system, and hence, that of the subsystem.

It is therefore you can find a robin in the forest: The forest benefits from the robin, and the robin benefits from the forest.

Any change that will have a positive impact on both yourself and your supersystem has a great survival value.

This is an evolutionary paradigm far more efficient than to be the fastest breeder or to have the sharpest elbows.