Why are some countries rich and some poor? This question has engaged—and frustrated—generations of economists. Some point to geography; others to natural resources, education or technology. Over the past three decades, however, another explanation has gained prominence: countries prosper because they build institutions that earn people’s trust. Nobel laureate Douglass North argued that good institutions reduce uncertainty. People save, invest and innovate only when they know that contracts will be honoured, property protected and rules applied fairly. More recently, Nobel laureates Daron Acemoglu and James Robinson used the Korean experience to illustrate this thesis. When the country was divided in 1948, the North and the South shared the same history, language and culture. Today, South Korea is one of the world’s richest and most innovative economies, while North Korea remains poor and isolated. Geography did not change. The people did not change. What changed was institutions. One built systems that rewarded enterprise, protected rights and encouraged innovation. The other concentrated power and stifled initiative.