The equilibrium theory of life evolution
  Apparent biodiversity on earth exists only if we compare different species separated from their environments. Meanwhile coexisting species have to be identical in terms of energetic interactions. Consider the biosphere as a network of chemical reactions. This leads to the conclusion that forces which drive life evolution may be found inside the process of the transformations of molecules. From the thermodynamic point of view the system of reacting particles reaches a steady state when the chemical potentials of reagents become equal. Interactions between chemical compounds taking part in concurrent reactions and the equilibration of their chemical potentials is the essence of biological evolution and its only driving force. 
D. Balciunas