Given any PoD from 1900 onward, if possible, the challenge is to make California as business-friendly and culturally conservative as Texas, North Dakota, South Dakota, or Montana, so that by 2013, the state has either no income tax or very low income tax, minimal business-stifling regulations, and if the movie industry is still in the state, it works more like 30s/40s Hollywood and not the modern Hollywood in that movie stars are very private and not as publicly self-destructive of themselves.
Where could such a divergence take place?