  The dynamics of molecular collisions in a macroscopic body are encoded by the
parameter Thermodynamic entropy - a statistical measure of the number of
molecular configurations that correspond to a given macrostate. Directionality
in the flow of energy in macroscopic bodies is described by the Second Law of
Thermodynamics: In isolated systems, that is systems closed to the input of
energy and matter, thermodynamic entropy increases. The dynamics of the lower
level interactions in populations of replicating organisms is encoded by the
parameter Evolutionary entropy, a statistical measure which describes the
number and diversity of metabolic cycles in a population of replicating
organisms. Directionality in the transformation of energy in populations of
organisms is described by the Fundamental Theorem of Evolution: In systems open
to the input of energy and matter, Evolutionary entropy increases, when the
energy source is scarce and diverse, and decreases when the energy source is
abundant and singular. This article shows that when rho to 0, and N to
infinity, where rho is the production rate of the external energy source, and N
denote the number of replicating units, evolutionary entropy, an organized
state of energy; and thermodynamic entropy, a randomized state of energy,
coincide. Accordingly, the Fundamental Theorem of Evolution, is a
generalization of the Second Law of Thermodynamics.
