Abstract

Ever since Democritus of Abdera (460-370 B.c.E.) introduced the concept of atoms in Western thought, later to be elaborated by Epicuros (as transmitted by Diogenes Laertius) and Lucretius, it lay at the basis of materialistic and atheist world views. Therefore, it may be less surprising to know that as late as 1624 in France, the teaching of atomism was a crime punishable by death. Even when atoms had been accepted, after the time of John Dalton (1766-1844), and indeed were considered indispensable by chemists, resistance against them continued among many physicists. Ludwig Boltzmann, who derived the laws of thermodynamics from the hypothetical existence of "atoms" was the foremost advocate of atomism in the nineteenth century, while another Austrian, Ernst Mach, was its most prominent opponent. Einstein’s first articles were entirely within the Boltzmann tradition. As he explained in his autobiography, his work on fluctuations and Brownian motion was undertaken because of his desire to guarantee the existence of atoms of definite finite size. Boltzmann’s statistical methods were also used by Max Planck for the quantum hypothesis of light, so &dquo;both roots of quantum theory, the Planck root and the Einstein root, go back to Boltzmann&dquo; (Boltzmann, 1981)