However, there are obviously many possible arguments on subtle cause/effects with correlated characteristics etc.
I provide no references, but plenty exist if you search.
( Sardinians are the shortest population in Europe,and Lithuanians one of the tallest )
Here in Lithuania Engineers are paid very well and are in high demand. For "very well" I mean compared to the average salary in the country, obviously you will get less money compared to UK or Germany. Cost of life is way cheaper than UK or Italy, both food and rent/mortgage is less than the other two countries
People who take care of themselves tend to have their life together. Correlation vs causation and all that.
Works well in careers where interacting with people might be more important than proficiency at the job.