noun: essential equality and interchangeability
noun: a state of being essentially equal or equivalent; equally balanced
noun: qualities that are comparable

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Schauberger
Since no heat or kinetic equivalence exist, but only the reactive intensification of development-fostering or development-impeding energies, an economic, social, moral and cultural decline had to take place as the scope of pressure-inducing machines and other such devices increased and intensified. [The Energy Evolution - Harnessing Free Energy from Nature, Magnetism - Electricism]