Max Roser

The Wikipedia community has built a tool that makes it possible to embed our interactive Our World in Data charts right in any Wikipedia page. I have always admired Wikipedia and all the people contributing to it. And I'm very happy that our work now can get used this way!

How has global poverty changed in our lifetimes? No matter what poverty line you choose, the share below it has declined globally.

When do people experience mental health conditions for the first time? — The key chart from @hannahritchie.bsky.social's new Our World in Data article: ourworldindata.org/when-do-peop...

My colleague @hannahritchie.bsky.social has published a brief guide to the new 'Living Planet Index' report that just got published today. Here it is: ourworldindata.org/2026-lpi-upd...

Just read that Abdullah Ibrahim has sadly died this week. He died at 91 and played wonderful music until his very end. One of my very favourite musicians. If you don't know him, listen to his Blue Bolero — it's the just the first 2 minutes of this. www.youtube.com/watch?v=L5i4...

A way to see the amazing history of economic growth and declining poverty over the last two centuries. (from the article 'What is economic growth?' ourworldindata.org/what-is-economic-growth)

Most career advice is disappointingly shallow. Which is really tragic, given how important a decision it is. It's a decision worth reading a good book about. Ben Todd is the most thoughtful person on career choice I know. He spent 15 years researching it. Now his book is out: 80000hours.org/book/

Congratulations to the data wizards at @ourworldindata.org who created this elegant tool so you can adjust fertility, mortality & migration rates for any country to see the impact on population sizes & age structures. This is really, really great!! Check it out!! Excellent tool, terrific write up.

Some people say we don’t build beautiful things anymore and, like, lol. Motherfuckers, we built this:

📢 We’re looking for a writer to join our team at Our World in Data! What we’re looking for is quite unique: someone who writes excellent narrative articles on large global problems, finds memorable framings to make hard ideas easier to understand, while being genuinely obsessed w/ technical details

Hey Bluesky hivemind! What are the best data sources for the overall death tolls of wars? So not just dead soldiers, but also civilians, and deaths from disease and starvation due to the fighting. Are Necrometrics and Wikipedia as flawed as they seem — or do they actually hold up to some scrutiny?

'Four minutes of air conditioning' The new, excellent essay by my colleague @hannahritchie.bsky.social on energy poverty. ourworldindata.org/four-minutes...

It has become received wisdom in Brussels and Washington that there is a new “euro-sclerosis”: that the EU economy is lagging the US This view is wrong A little primer on the measurement of productivity – and why reports of the economic death of Europe are greatly exaggerated🧵

Over the last months, we’ve entirely rebuilt search on Our World in Data — we just launched it: ourworldindata.org/introducing-... Let me know what you think. Does it work for you?

A big shift in technology. The purple bars show the sales of cars powered by combustion engines in China. In green, you see the rise of electric cars in recent years.

💡New feature: hovering over links to charts shows a preview! Look out for the little chart icon next to a link to know when you can see a preview. Our colleague Ike Saunders had this idea just a couple days ago and he already built it and made it live on our site — thanks, Ike!

It is September 18. Today, @hannahritchie.bsky.social's book is out! www.penguin.co.uk/books/462676...

"A refreshingly pragmatic and undoomy book." The Guardian just published a great review of @hannahritchie.bsky.social's new book 'Clearing the Air'. The book will be out in 2 days. If you are unsure whether you want to read it, the review gives a good overview: www.theguardian.com/books/2025/s...

Our @ourworldindata.org we visualise weekly updates of wildfire data from the Global Wildfire Information System. Spain was having a pretty low/average year until the past few weeks when it went roaring past previous years. You can track this data here: ourworldindata.org/wildfires

My colleague @hannahritchie.bsky.social wrote a new book! For an author, pre-orders make a huge difference — as they convince bookstores to stock it. If you are interested in Hannah's writing, you can order it here: penguin.co.uk/books/462676...

Duolingo came out fully embracing AI in April, and it’s hard not to read their latest revenue growth numbers alongside this new report on the state of formal language learning in the UK

Most electricity in the Netherlands now comes from renewables. This is today's @ourworldindata.org Data Insight from my colleague @simonvanteutem.bsky.social. All our Data Insights are here: ourworldindata.org/data-insights

Every third car in Norway is now an electric car.

At least since the mid-20th century, England has left mass hunger behind. How was this possible? How did English farmers prove Malthus wrong? My 'Data Insight' on @ourworldindata.org today is about rising yields and falling hunger. → ourworldindata.org/data-insights

No, it's not the case that only China is responsible for the large decline in extreme poverty over the past decades. We wrote about it recently: ourworldindata.org/data-insights/was-the-global-decline-of-extreme-poverty-only-due-to-china

My latest Data Insight is about extreme poverty in South East Africa. In Madagascar, Malawi, Mozambique, and Zambia, extreme poverty is not declining.

In 2014, half of Greece's electricity was generated by coal. A decade later, that share has fallen to just 6%.

Two billion people don’t have safe drinking water. I really like the article of my colleague @hannahritchie.bsky.social, in which she shows what this concretely means for these people, by relying on the portraits of families in Gapminder's Dollar Street project. ourworldindata.org/what-no-safe...

If you are interested in our work at Our World in Data, you can subscribe to our newsletters — in recent months we made them much better. Here is what we offer and how you can subsribe: ourworldindata.org/newsletters

My chart on the history of three infectious diseases — smallpox, polio, and measles — before and after a vaccine was available.

For the first time ever, China's CO₂ emissions are falling due to clean energy growth, rather than reduced power demand.

A single dose cuts the chances of measles by about 95% — a second dose reduces the risk further. How effective and safe are measles vaccines? In her new article, my colleague @scientificdiscovery.dev summarized the findings of a Cochrane meta-analysis. ourworldindata.org/measles-vacc...

I don't doubt that a lot of people are considering leaving, but perhaps someone could tell Nature how to write survey questions

In 2004, it took the world a year to add one gigawatt of solar power — now it takes a day.