Book excerpt: When institutions protect the liberty of individuals, greater prosperity results for all. Economist Adam Smith formed this theory in his influential work, The Wealth of Nations, in 1776. In 2008, his theory is measured-and proven-in the Index of Economic Freedom, an annual guide published by the Wall Street Journal and the Heritage Foundation, Washington's no. 1 think tank. Since 1995, the Index has brought Smith's theories about liberty, prosperity and economic freedom to life by crating 10 benchmarks (business freedom, trade freedom, fiscal freedom, government size, monetary freedom, investment freedom, financial freedom, property rights, freedom from corruption and labor freedom) that gauge the realities of economic life in countries around the world. With its user-friendly format, readers can see how 18th century theories on prosperity and economic freedom are realities in the 21st century.