The fact that we get motive power now from machines and extraneous energy, rather than human muscle power,as in the past,makes it possible to run an engine, stove, jet or dynamo, and is one reason why literal human slavery became obsolete in the early part of the Industrial revolution. It became to expensive to maintain humans in regard to their labor contribution. It became pointless within the context of the Price System to literally enslave humans when machines could do most of the work in a more energy efficient way. Since the Price System is all about making money and social control, the so called morality of enslaving other humans was never the root issue. Money making is always the root issue in a Price System. Because of our various energy production and delivery systems now, and the myriad designs which convert that power into desired functions, each person now has many inanimate energy appliances working on their behalf 24 hours a day, 7 days a week. Unlike the former human slaves that were overtly used in the past, such energy converting machines do not suffer, tire, complain, or run away. In the current system most all participate in another kind of slavery (wage slaves) Energy Accounting offers the alternative to that Price System method. To view this document click on the blue Pdf in the 'view the book' section on the left.