Development
Marshall Plan
Definition
The US-funded program ($13B in 1948 dollars, ~$170B today) that rebuilt Western European economies after WWII — history's most successful development aid program.
Explanation
The Marshall Plan rebuilt infrastructure, revived industry, and established institutions that underpinned European prosperity. It is frequently cited as a model for reconstruction (Ukraine, post-conflict states). Unlike most aid, it combined capital transfers with institutional requirements.