Several factors came together. Europe had a population that was on average richer than most other cultures. A very competitive commercial class, ships that were superior than other cultures, developed for the rough North Atlantic, and a number of competitive states rather than a single empire.
Peninsulares were the upper class
Inventions from the Second IR and economic opportunities
Dr. Jackson supports the biological model that shows how psychological disorders and hormonal imbalance can be inherited through genes. Genetics can open susceptibility through the chemical combinations in the body that can be studied and controlled with proper professional treatment.