The entire development of particle physics has been rather inelegant. Only later has it become a (sort of) coherent framework. For example, take a look at http:

The entire development of particle physics has been rather inelegant. Only later has it become a (sort of) coherent framework. For example, take a look at http://en.wikipedia.org/wiki/Muon#History http://en.wikipedia.org/wiki/Muon#History