We take it as a given, almost a fact of nature like the seasons or the geography of continents, that different parts of the world enjoy different levels of prosperity. But there’s nothing “natural” about this since this is almost entirely within human control. The differences are stark, and at one end of the scale, heartbreaking. Consider the extremely rich first. Luxembourg has an annual per capita income of over $110,000, Norway over $100,000, Switzerland around $85,000. Those are small countries and outliers with perhaps little to tell us. But the US is large and has an annual per capita income of $53,000. Why is it so rich?
At the other end of the scale are Burundi and Malawi with only $200 or so annual per capita incomes. Why are they so poor? The richest countries are around 500 times richer in per capita terms than the poorest. What accounts for this inequality in incomes of countries? That question has engaged the attention of people for hundreds of years — starting with of course the great Scottish economist Adam Smith who inquired about “The Nature and Causes of the Wealth of Nations” in his famous 1776 book.