ABSTRACT
The new pathway to particle physics described in the last chapter turned out to be a dead end, and so old concepts were revived. In the past, the old atomistic program had been very successful: many substances could be reduced to the chemical elements, and the elements reduced to the constituents of atoms such as electrons, protons, and neutrons. So why should one stop there and not try to explain the many new elementary particles as composites of a few fundamental constituents?
