This volume continues and prolongs the earlier, highly successful series "L’Université de tous les savoirs" (365 lectures, published in six volumes by Editions Odile Jacob). Renowned specialists in their fields examine the inequalities that exist between countries as well as among individuals: unequal access to education, the technological gap, unequal treatment before the law, economic inequalities, and disparities concerning health and hygiene.

Contributions by Catherine Audard, Marc Fleurbaey, Marie-Laure Izorche, Geneviève Koubi, François Orivel, Thomas Piketty, Rubens Ricupero, Lise Rochaix, Gilles Saint-Paul.