There is a biochemical and anatomical difference. Exhausted would implies that there is no available energy for the task at hand and enervated would suggest that the intended task lack the nervous potential to be actuated. That said, in popular discourse, there is not much difference between the two.
Systems theory has also been developed within sociology. An important figure in the sociological systems perspective as developed from GST is Walter Buckley (who from Bertalanffy's theory). Niklas Luhmann is also predominant in the literatures for sociology and systems theory.
Existing theories had tended to be reductionist, understanding the whole by breaking it into its parts. Von Bertalanffyâs introduction of systems theory. changed that framework by looking at the system. as a whole, with its relationships and interactions. with other systems, as a mechanism of growth and. change.