Interesting. Not sure that I totally buy the size of the commutarian group- and I'm not a huge fan of 2 axis charts. Sometimes they have an agenda (e.g. the political compass trying to say that the Democrats are conservative or libertarian organizations trying to push people into the bottom right), but regardless, they are not super descriptive for an ideology.
The part I really do find interesting is that this suggests that conservatism as an ideology is actually rooted in the suburbs and is not inversly correlated to education at all. I've been saying that for a long time. I imagine that the same actually applies for the backbone of religious-based social conservative movements. Even if it's not everybody in well-off suburbs, movements like these tend to have their most fervent support in suburbs. For example, I guarantee you that evangelicals who actually don't drink, save themselves for marriage, avoid cursing, and the like come from a lot less rural and "white working class" backgrounds than a lot of people assume.
Was this in dispute?
The problem is that subsequent generations in suburbs aren't "conservatives", or aren't conservative enough to maintain political power at the state or county level.
Lets take a hypothetical state with a break down of 45% suburbs, 35% urban and 20% rural.
Lets say those suburbs vote Democratic 52%, the rurals go 70% Republican and Democrats win 75% of the urban.
Even at those levels, the Republican vote in said state would be overwhelmingly suburban. 45*48 = 21.6% 20*70 = 14%.
This is a point that RinoTom makes a lot, that by necessity Republicans have to get most of their votes in the suburbs, but the problem is they either can no longer command majorities in those suburbs or their majorities are too weak to offset the urban vote even when combined with the rural population.
This is caused by three main factors:
1. Generational Displacement
2. New demographics moving in who feel left out by dominant party
3. Party alienation.
Typically a combination of one and/or two produce a feedback loop with the national party that leads to number three.