A work of photojournalism that deals with the New York City's slums in the 1880s. It includes the images of the squalid living conditions of 'the other half', who might well have inhabited another country.

In this powerful new work, Thomas Piketty reminds us that rising inequality is not inevitable. Over the centuries, we have been moving toward greater equality. Piketty guides us with elegance and concision through the great movements that have made the modern world and shows how we can learn from them to make equality a lasting reality.