Thomas Piketty Profile picture
Jun 4 7 tweets 4 min read Read on X
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]Image
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. Image
In order to raise the resources necessary to finance sustainable convergence, as well as improve the living standards of lower- and middle-income groups (both in the Global South and North), it is inevitable to drastically reduce wealth and income inequality:

⤴️World's poorest half to reach 30% in global wealth, up from 2%
⤵️Billionaires’ wealth share to drop from 6% to 0.05%Image
We envision a new institution, the Global Justice Fund to finance this sustainable convergence path. The fund would raise revenue via global wealth and income taxes to be used for climate investments, expansion of health and education, and building up a World Sovereign Fund.

The Global Justice Fund would average 10.3% of world GDP annually between 2030 and 2060 — compared with less than 0.4% currently allocated to development aid and international organizations.Image
To cover the investment needs of the transition, the fund will be 20x larger than current development aid. Still, the flows from the Global North to the Global South are far from making up for historical climate and colonial damages caused by the North. This provides strong reason to further scale up the platform.Image
The current international order is plutocratic. In the IMF, rich countries have four times more voting rights than their population share, while poor countries have four times less. It is essential to move away from this plutocratic system to a new democratic order with a one-person one-vote order.Image
This is the result of more than two years of research of 45 direct contributors and in continuation of many international initiatives and a much longer research tradition on inequality and the climate crisis.
Find report, website, research papers and more here: globaljusticeproject.wid.worldImage

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Thomas Piketty

Thomas Piketty Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @PikettyWIL

Oct 27, 2025
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
(3/8)
All rich countries—especially in Western and Nordic Europe—have undergone an enormous compression of income scales during the 20th century, while becoming significantly more productive.
In Nordic Europe, the bottom posttax 50% share rose from little more than 15% in 1910 to almost 40% in 1980-90.Image
Image
Read 9 tweets
Sep 15, 2025
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…
Our new study shows that the Kaldor’s stability claim does not hold at the global level.

Large historical and regional variations exist, that are shaped less by technology or pure economics than by institutions, ideology, and power relations.
Below are 3 key findings from the study👇
Read 7 tweets
Jun 18, 2025
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]Image
📊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]
📉 Over two centuries, global work hours have fallen significantly (-34%), from 3,200 hours (≈ 60-65 hours per week all year long) to 2,100 hours (≈ 40 hours per week including two weeks in paid vacation).

This happened through collective mobilizations, class struggles, changing institutions and social norms.
[3/8]Image
Read 8 tweets
Jun 16, 2025
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]
📉 Over two centuries, global work hours have fallen significantly (-34%), from 3,200 hours (≈ 60-65 hours per week all year long) to 2,100 hours (≈ 40 hours per week including two weeks in paid vacation).
This happened through collective mobilizations, class struggles, changing institutions and social norms.
[3/8]Image
Read 8 tweets
Jun 9, 2025
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]Image
Between 1800 and 1914, Europe built vast foreign wealth.
[3/9] Image
Read 9 tweets
Jun 24, 2024
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 Image
(3) La fracture territoriale s'est approfondie et atteint des niveaux inédits depuis l'entre-deux-guerres et la fin du 19e siècle

Pour poursuivre le processus de rebipolarisation, le bloc de gauche doit reconquérir une proportion plus importante de l’électorat populaire des bourgs et des villagesImage
Image
Read 4 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(