When was the last time you read a grand statement, accompanied by a large number and wondered whether it could really be true? Statistics are vital in helping us tell stories - we see them in the papers, on social media and we hear them used in everyday conversation - and yet we doubt them more than ever. But numbers - in the right hands - have the power to change the world for the better. Contrary to popular belief, good statistics are not a trick, although they are a kind of magic.

The world economy defies comprehension. A continuously changing system of immense complexity, it offers over 10 billion distinct products and services, doubles in size every 15 years, and links almost every one of the planet's seven billion people. How can we make sense of this bewildering system on which our lives depend? From the tally stick to Bitcoin, the canal lock to the jumbo jet, each invention in Tim Harford's fascinating new book has its own curious, surprising and memorable story, a vignette against a grand backdrop.

The urge to be tidy seems to be rooted deep in the human psyche. Many of us feel threatened by anything that is vague, unplanned, scattered around or hard to describe. We find comfort in having a script to rely on, a system to follow, in being able to categorise and file away. We all benefit from tidy organisation - up to a point. A large library needs a reference system. Global trade needs the shipping container. Scientific collaboration needs measurement units. But the forces of tidiness have marched too far.

Brilliant and engagingly written, Why Nations Fail answers the question that has stumped the experts for centuries: Why are some nations rich and others poor, divided by wealth and poverty, health and sickness, food and famine?

Jede politische Ökonomie umkreist die Fragen nach der Evolution von Ungleichheit, der Konzentration von Wohlstand und den Chancen für ökonomisches Wachstum. Aber befriedigende Antworten gab es bislang kaum. Thomas Piketty untersucht Daten aus 20 Ländern, mit Rückgriffen bis ins 18. Jahrhundert, um die entscheidenden ökonomischen und sozialen Muster freizulegen. Seine Ergebnisse setzen die Agenda für eine neue Diskussion über Wohlstand und Ungleichheit.