If we want to understand the world,understand the entire planet we live, understandpeople’s lives, the simplest way is possibly theinspection of average income per person. Theworld’s average income per person, in the past30 years, or recently 5 years, had If we want to understand the world, understand the entire planet we live, understandpeople’s lives, the simplest way is possibly theinspection of average income per person. Theworld’s average income per person, in the past30 years, or recently 5 years, had