The world today is characterized by large-scale inequalities. And a climate crisis is looming over us.

We urgently need a new vision for global progress in the 21st Century. One that grounds human development and equality in planetary habitability.

What would it take to achieve high prosperity and equality while remaining within planetary boundaries?

The World Inequality Lab is very excited to launch the #GlobalJusticeReport.
[1/7] The key finding of the report is that energy transition alone will not suffice.

We need to combine it with "sufficiency" to stay within 2 degrees. This includes labour hour reductions, growth caps in rich countries, less material consumption, and changes in food habits.

There is a strong positive association between equality and development over the long run — that's what our historical series available on wid.world are clearly showing.

Key findings in thread 🧵(1/8)👇
wid.world/news-article/e… (2/8)
Our new study uses data (1800–2025)and new global series on productivity and human capital to revisit how the relationship between equality and development has evolved across time and space – a central question for economists, policymakers, and citizens alike.WID.world

Net private wealth has skyrocketed since 1980 - this is one of the main findings of a new @WIL_inequality study overturning the Kaldor’s facts.
More in thread 🧵
Study🔗 wid.world/news-article/f… With @LuisBauluz, Pierre Brassac, Jonas Dietrich, @cmtneztt , @gatonievas, Moritz Odersky, @AliceSodano, and @anmol_smnch, we constructed the first global database of wealth accumulation covering 1800–2025.
🌐It covers 85–90% of world GDP.
📊Data is available to download here: wid.world/methodology/#l…

Work time reduction and gender equality should accelerate their historical trajectory in the 21st century.

The #FutureofWork must also respond to growing demands for planetary sustainability and socioeconomic justice.

🔗wid.world/news-article/p…

🧵A thread on our study with @MarieAndreesc, @thomaspiketty.bsky.social, R. Loubes & A.S Robilliard.

[1/8] 📊This study draws on harmonized historical series on labour hours by gender, employment status and sector — covering 40+ countries from 1800 to today.

Based on these historical trends, we outline a potential path to a high-productivity, high-leisure future by the year 2100.
[2/8]

Work time reduction and gender equality should accelerate their historical trajectory in the 21st century.

The #FutureOfWork must also respond to growing demands for planetary sustainability and socioeconomic justice.

🧵 A thread on a study with @MarieAndreesc, R. Loubes & A.S Robilliard.

[1/8]
wid.world/news-article/p… 📊 This study draws on harmonized historical series on labour hours by gender, employment status and sector — covering 40+ countries from 1800 to today.
Based on these historical trends, we outline a potential path to a high-productivity, high-leisure future by the year 2100.
[2/8]

Colonial extraction and unequal exchange have shaped two centuries of North-South inequality.

🧵A thread on a NEW STUDY written with @gatonievas
[1/9]

🔗 wid.world/news-article/u… 📊The study draws on a new database wbop.world tracking global trade flows and the balance of payments (goods, services, income, and transfers) across 57 core territories (48 main countries + 9 residual regions) from 1800 to 2025.
Check it out wbop.world
[2/9]

Le début de la fin de la tripartition? Elections européennes et inégalités sociales en France 1994-2024, avec @CageJulia

Les fractures territoriales des Européennes 2024 en perspective historique

Trois résultats à retenir


wid.world/wp-content/upl…
wid.world/fr/news-articl… (1) Des écarts de participation entre communes riches et pauvres à leur plus haut niveau historique

Notre démocratie est malade et le restera tant que les partis au pouvoir et un trop grand nombre de médias concentreront leur attention sur les classes sociales favorisées

What's new about global inequality?
WID.world just released its new annual updates, with novel findings from East Asia, Latin America, Europe, the Middle East & North Africa, Subsaharan Africa, North America, Russia & Central Asia
wid.world/news-article/w… See new findings on plutocratic China by regional coordinator Zhexun Mo
Bottom 50% wealth share is now only 6%, vs 70% for the top 10% and 10% for the top 0,001% alone
This raises serious doubt about Xi Jinping's desire to fight corruption & rebalance the distribution of wealth

Download the new World Inequality Report 2022!
Freely available in English, French, Spanish, Mandarin, Arabic, Hindi, Russian, German, Turkish
A world tour of new global inequalities after Covid
See below 3 key lessons in 3 figures
wir2022.wid.world/www-site/uploa…

wir2022.wid.world Key lesson 1: we observe an extreme level of wealth concentration across the world. The richest 10% own around 60-80% of wealth in the various world regions. The poorest 50% always own less than 5%. And wealth inequality has been rising after Covid.

All slides from my cancelled NYU teaching are now online

Lecture 1: Development, state formation & inequality in the long-run: from ternary to proprietarian societies
piketty.pse.ens.fr/files/PikettyN…
⬇️ Lecture 2: Property rights & development, 18c-19c: European variants (France, Britain, Sweden)
piketty.pse.ens.fr/files/PikettyN…

Lecture 3: Slave societies, abolitions & colonialism (Caribbean, US, Brasil, Africa)
piketty.pse.ens.fr/files/PikettyN…
⬇️