guess ill go first :P

[Manzcar]

Theoretically each state is or groupings of states in the US is the equivalent size of a country in Europe. Taking that into consideration you will have different cultural beliefs, languages, social interactions.

Also considering the OP on this, one would also have to look at the home structure of the individual. I am a firm believer that a child from a two parent home has a better chance than a child from a single parent home. Not a rule but a factor. It is easier to raise a child when there are two active parents guiding the child. It is harder when there is only one parent.

Just a thought.