In fact, the US is broken up into 50 pieces, and some pieces fare much better than others in terms of violence/suicide per capita depending on the region. > No

In fact, the US is broken up into 50 pieces, and some pieces fare much better than others in terms of violence/suicide per capita depending on the region. > Nope. US problems are due to culture, not size. Probably a combination of both. Culture isn't a thing that can be easily changed, though.