Piketty’s treatment of inequality is perfectly matched to its moment. Like [Paul] Kennedy a generation ago, Piketty has emerged as a rock star of the policy-intellectual world… But make no mistake, his work richly deserves all the attention it is receiving… Piketty, in collaboration with others, has spent more than a decade mining huge quantities of data spanning centuries and many countries to document, absolutely conclusively, that the share of income and wealth going to those at the very top―the top 1 percent, .1 percent, and .01 percent of the population―has risen sharply over the last generation, marking a return to a pattern that prevailed before World War I.
Thomas Piketty is Professor at the Paris School of Economics.