[reckoner2]

> Here is a question Piketty didn't ask: what percent of dynastic, billionaire wealth was created in a single generation in America? Not addressed at all. (And I read his book and wrote to him with my criticism, which he didn't reply to.)

Actually he has addressed this, and the answer is relatively little. Most wealth in the world is passed down from one generation to the next, growing at a rate faster than the economy in general. Many of the richest families in the world from centuries ago are still the richest families. Other than in small pockets of the world, like silicon valley, new money is pretty rare.

[logicallee]

But I specifically asked about small pockets of the world, like silicon valley. Specifically, I asked about billionaire wealth in the United States.