The answer is capitalist economy.
Louisiana State penitentiary
Speed processing is one of the main elements in the cognitive process, so this is a key element for learning, intellectual development, reasoning and experience. Some people can achieve any task faster than others, but it doesn’t mean that the one “slow” is less intelligent, he just takes more time to finish the same task.
Slow processing is not a learning problem and it is not related with intelligence, but it can impact in all stages of learning. In this way, speed can contribute to learning difficulties such as ADHD, dyslexia, dyscalculia or auditory processing disorder.
It can also be impaired when coexists with autism spectrum disorders, and in other pathologies such as dementias or diseases such as schizophrenia.
The First World War had been good for American business. Factory production had risen sharply to meet the needs of the war. America had been able to capture markets that used to buy from Europe. Once the war was over these countries continued to buy American goods.
I think that regions generally share the same culter because they are near each other and so they learn off of each other