This document summarizes Thomas Piketty's proposal for a progressive global wealth tax. The key points are: 1. Piketty proposes a wealth tax of 0% on fortunes below 1 million euros, 1% between 1-5 million, and 2% above 5 million. 2. The goal is to address the tendency under capitalism for returns on capital (r) to exceed economic growth (g), leading to increasing inequality over time. 3. A wealth tax could help reduce European debt levels by generating revenue equivalent to 10-20% cuts for wealthy countries. 4. The author argues such a tax is necessary to counteract rising inequality driven by inheritance and returns on large fortunes