What is the lifetime risk of depression?
Depression is one of the world’s most common health conditions. It's estimated that one-in-three women and one-in-five men have an episode of major depression by the age of 65.
May 18
Article
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Our latest articles, data updates, and announcements
May 13
Article
What share of people say they are vegetarian, vegan, or flexitarian?
Most people still eat some meat, but surveys suggest that many are adopting a diet with less animal products.
May 09
Article
The largest mammals have always been at the greatest risk of extinction – this is still the case today
Humans hunted many of the world’s large mammals to extinction. This threat still exists today, but it doesn’t have to be that way.
April 20
Article
Humans destroyed forests for thousands of years — we can become the first generation that achieves a world in which forests expand
Why has humanity destroyed such vast forests? And how can we bring this to an end?
April 07
Article
At what age do people experience depression for the first time?
People are being diagnosed with depression at an earlier age than in the past because of increased openness to mental health disorders and improved diagnostic guidelines.
April 04
Article
Increasing agricultural productivity across Sub-Saharan Africa is one of the most important problems this century
Agricultural productivity across Sub-Saharan Africa needs to improve to reduce hunger, poverty, and the destruction of biodiversity.
March 24
Article
How could the war in Ukraine impact global food supplies?
Both Ukraine and Russia are some of the world’s largest food exporters. How could global food be impacted?
March 22
Article
Malaria: One of the leading causes of child deaths, but progress is possible and you can contribute to it
We do not have to live in a world where 1,320 children die from a preventable disease every day.
March 18
Article
The International Energy Agency publishes the detailed, global energy data we all need, but its funders force it behind paywalls. Let's ask them to change it.
For energy security and progress on climate change we need open data on energy. The funders of the IEA can make this happen.
March 15
Article
The future is vast – what does this mean for our own life?
If we manage to avoid a large catastrophe, we are living at the early beginnings of human history.
March 08
Article
Migration data: our sources and definitions
Where does our migration data come from? How are these metrics defined?
March 03
Article
Nuclear weapons: Why reducing the risk of nuclear war should be a key concern of our generation
The consequences of nuclear war would be devastating. Much more should – and can – be done to reduce the risk that humanity will ever fight such a war
February 16
Article
Employment in agriculture: data sources and definitions
How do we produce long-term datasets on agricultural employment?
February 10
Article
Why randomized controlled trials matter and the procedures that strengthen them
Randomized controlled trials are a key tool to study cause and effect. Why do they matter and how do they work?
February 09
Article
CO₂ emissions dataset: our sources and methods
How do we construct our global data on CO₂ emissions?
February 07
Article
FAQs on the environmental impacts of food
Common questions on data on the environmental footprint of foods
February 06
Article
What is childhood wasting?
Childhood wasting is an important indicator of malnutrition. What is it, and how is it measured?
February 04
Article
What is childhood stunting?
Stunting is an important marker of childhood malnutrition. But what is it, and how is it measured?
February 04
Article
What is undernourishment and how is it measured?
How do we measure the prevalence of hunger across the world?
February 03
Article
In most countries, democracy is a recent achievement. Dictatorship is far from a distant memory
How old are democracies across the world?
January 31
Article
How we’re building a team for better data at Our World in Data
Data is too often published in a way that’s hard to understand, check and build upon – reinforcing the low valuation it gets in society. Here is how we’re trying to break out of this bad equilibrium.