invoking the fluctuation-dissipation theorems of Einstein and 2 more recently those of Callen and Kubo in order to get to manageable results. In this manner, great strides have been made in the development of the many-body problem without reaching the necessity to legitimize thermodynamics. Ther- modynamics and statistical mechanics were used successful- ly as bridges and guides to get the new ideas to conform to the macroscopic experiences (measurements). Hence the dis- 3 interest of theoreticians. The frustration in attracting the at- tention of the working physicists on this problem is...