Based on the valuable criticism Section 2 has been extensively revised. Terminology has been clarified. This Section has a rather restricted purpose. It provides chemical arguments for the proposition that the pioneer organisms could only exist at high temperature and that the subsequent forms of life remained hyperthermophilic for a long time until much later an irreversible evolution generated organisms that required lower and lower temperatures. This conclusion places severe constraints on all aspects of the evolution of the genetic machinery. The fascinating topics of thermodynamics, energy dissipation and information are outside the scope of the paper.
The alternative views he previously generated are much expanded in this manuscript.