It appears to me that there's been a trend in recent history. As a nation becomes developed and industrial, its economic/governmental structure seems to move towards a common point. America, Europe, the Commonwealth, Russia, all these places have representative democractic political structures. Their economy, whether they started out with central planning or free market, are regulated capitalism with social safety net programs. Though parties in these places might argue over the exact parameters, no one except a few on the frings disagree with this basic structure. Considering the vast number of ways to structure a nation, this is pretty spectacular. Even China seems to be moving in this direction.
This interests me greatly, that all modernized nations seem to move into this range, as I see it. Anyone have any theories why?