Thomas Piketty’s new book, Capital and Ideology, appears in English translation next March. But I got a sneak preview by walking into my local Parisian bookshop and handing over €25 for the French edition. My conclusion: the 1,200-page tome might become even more politically influential than the French economist’s 2013 overview of inequality, Capital in the Twenty-First Century.

Helped a little by that book, inequality has soared up the left’s agenda, especially in the particularly unequal US and UK. Now Elizabeth Warren has a shot at becoming the most redistributionist US president since Franklin D Roosevelt, while an electable post-Corbyn Labour leader could achieve similar in Britain.

Piketty explains why this could be the moment for a turn to equality, and which policies could make that happen.