<p>“The billionaires’ nightmare”, “Rockstar Economist”, or “far-left activist”, Professor Gabriel Zucman goes by many names.With Elon Musk on his way to reaching trillionaire status, public debt accelerating, and far-right parties threatening democratic institutions, a consensus is emerging that economic inequality is reaching excessive levels. The most important question now becomes not why, but how we tax the rich.Zucman is one of the world&#39;s foremost experts on economic inequality, tax havens and wealth taxation. Having picked up the torch from his colleague Thomas Piketty, he is increasingly the face of a French and global movement for taxation of the tax-avoiding ultra-wealthy and multinational corporations.</p>