The great logician Gottlob Frege attempted to provide a purely logical foundation for mathematics. His system collapsed when Bertrand Russell discovered a contradiction in it. Thereafter, mathematicians and logicians, beginning with Russell himself, turned in other directions to look for a framework for modern abstract mathematics. Over the past couple of decades, however, logicians and philosophers have discovered that much more is salvageable from the rubble of Frege's system than had previously been assumed. A variety of repaired systems have been proposed, each a consistent theory...

Economic inequality is one of the most divisive issues of our time. Yet few would argue that inequality is a greater evil than poverty. The poor suffer because they don't have enough, not because others have more, and some have far too much. So why do many people appear to be more distressed by the rich than by the poor?

In this provocative book, the #1 New York Times bestselling author of On Bullshit presents a compelling and unsettling response to those who believe that the goal of social justice should be economic equality or less inequality. Harry Frankfurt, one of...