Alexander Gerschenkron, complicated this theory with works on how economies develop in non-Western countries, as discussed in Economic Backwardness in Historical Perspective: A Book of Essays (1962). A more recent work is Daron Acemoglu and James A. Robinson's Why Nations Fail: The Origins of Power, Prosperity, and Poverty (2012) which pioneered a new field of persistence studies, emphasizing the path-dependent stages of growth. Other notable books on the topic include Kenneth Pomeranz's The Great Divergence: China, Europe, and the Making of the Modern World Economy (2000) and David S. Landes's The Wealth and Poverty of Nations: Why Some are So Rich and Some So Poor (1998). In recent decades, and notably since the global financial crisis of 2007–2008, scholars have recently become more interested in a field which may be called new new economic history. Scholars have tended to move away from narrowly quantitative studies toward institutional, social, and cultural history affecting the evolution of economies. The focus of these studies is frequently on "persistence", as past events are linked to present outcomes. Columbia University economist Charles Calomiris argued that this new field showed 'how historical (path-dependent) processes governed changes in institutions and markets.' However, this trend has been criticized, most forcefully by Francesco Boldizzoni, as a form of economic imperialism "extending the neoclassical explanatory model to the realm of social relations." Conversely, economists in other specializations have started to write a new kind of economic history which makes use of historical data to understand the present day. A major development in this genre was the publication of Thomas Piketty's Capital in the Twenty-First Century (2013). The book described the rise in wealth and income inequality since the 18th century, arguing that large concentrations of wealth lead to social and economic instability. Piketty also advocated a system of global progressive wealth taxes to correct rising inequality. The book was selected as a New York Times best seller and received numerous awards. The book was well received by some of the world's major economists, including Paul Krugman, Robert Solow, and Ben Bernanke. Books in response to Piketty's book include After Piketty: The Agenda for Economics and Inequality, by Heather Boushey, J. Bradford DeLong, and Marshall Steinbaum (eds.) (2017), Pocket Piketty by Jesper Roine (2017), and Anti-Piketty: Capital for the 21st Century, by Jean-Philippe Delsol, Nicolas Lecaussin, Emmanuel Martin (2017). One economist argued that Piketty's book was "Nobel-Prize worthy" and noted that