Electricity, Weakness and Color
Prof. Gerard 't Hooft (Institut für Theoretische Physik der Universität Utrecht/NL)

The successful unification of Quantum Theory with the Theory of Special Relativity lead to the Standard Field Theory of Elementary particles. The fundamental building blocks are fields describing pointlike particles with spin zero, one-half or one, in units of Planck's constant.

Details of the theory had to be supplied by experimentation. It turns out that there are three fundamental forces, which may act differently on left-rotating particles and right-rotating particles. It is suspected that these forces can be better understood if the theory can be unified with General Relativity, which is Einstein's theory of the gravitational force.