ABSTRACT
The author gives two reasons for making a new kind of quantum mechanics. One is a mathematical reason, which is that we get a better understanding of a system of postulates if one has more than one realization; and specifically they get a better understanding of complex quantum mechanics, if one understand which features of the usual complex quantum mechanics are more general than others. The second reason is a physical motivation: the current state of particle theory can be represented pretty much like this chapter. Now attempts over the last fifteen years to construct the common dynamical machine, using local complex quantum mechanics, have run into difficulties. At least, there isn't a natural, obvious, simple unifying model. So that raises the question whether something new is needed, and the author thinks most of the focus of physics for the last year or two has been on trying new things.
