Thomas Piketty
Documented rising wealth inequality and proposed global capital taxation.
Who was Thomas Piketty?
A French economist known for his extensive empirical work on income and wealth distribution. His 2013 book, "Capital in the Twenty-First Century," used centuries of data to show wealth concentration returning to levels last seen in the late 19th century.
“All wealth comes from somewhere.”
— Thomas Piketty, "Capital in the Twenty-First Century," 2013
Thomas Piketty (born 1971) is a French economist who has focused his career on the empirical study of income and wealth inequality. He served as an associate professor at EHESS from 1995 to 2000 and later became a professor at the Paris School of Economics. His early research, often in collaboration with Emmanuel Saez, systematically compiled historical data on top income shares across several countries, including France and the United States, dating back to the early 20th century.
His 2013 book, "Capital in the Twenty-First Century," became a global bestseller, selling over 2.5 million copies worldwide. The book synthesized decades of research, presenting a theory that when the rate of return on capital (r) consistently exceeds the rate of economic growth (g), wealth tends to concentrate, exacerbating inequality. Piketty's analysis drew upon 200 years of data from over 20 countries, illustrating how inherited wealth can grow faster than earned income.
Piketty's work significantly influenced public discourse and policy debates on economic inequality, prompting renewed attention to wealth taxation and inheritance taxes. He has advocated for policies such as a global tax on wealth, arguing it is necessary to curb increasing concentrations of capital. His subsequent book, "Capital and Ideology" (2019), expanded his historical scope to examine how political and ideological narratives have shaped inequality regimes over millennia.
His research has demonstrated that in many advanced economies, the share of total wealth owned by the top 1% has risen significantly since the 1980s, often approaching or exceeding the 30% mark by the 2010s in nations like the U.S. and France.
Key Contributions
- Co-authored "Top Incomes in France 1901-1998" (2001), pioneering the use of tax data for inequality studies.
- Published "Capital in the Twenty-First Century" (2013), an international bestseller detailing the dynamics of wealth concentration over 250 years.
- Developed the "r > g" framework, positing that when capital returns outpace economic growth, wealth inequality naturally increases.
- Advocated for a global progressive wealth tax, influencing policy debates in the 2010s.
Economic Context
Between 1971 and 2024, France experienced robust economic expansion, with GDP per capita climbing from $3,137 to over $46,103. Despite this growth and a taming of inflation from 5.40% to 2.00%, the nation's trade balance notably shifted from a surplus to a deficit exceeding $10 billion.
Legacy
Piketty's work revitalized the study of wealth and income distribution, grounding it in extensive historical data. His analyses have profoundly shaped contemporary economic policy debates on taxation and inequality, pushing the issue higher on political agendas globally since 2013.