The universe as a whole is determined
by gravity, which is described by the general
relativity theory. Its constituents, the elementary
particles, behave according to the rules of quantum
field theory or, more specifically, according to the standard
model of particle physics. Super string
theory could turn out to be the single elegant
Theory of Everything
[P10ctoex]
physicists dream of. This may also solve the
old outstanding (philosophical) problem of the interpretation
of quantum theory (collapse of the wave function, Schrödinger's
cat,...).