A generation ago, poliomyelitis paralyzed hundreds of thousands of children every year. Many countries have now eliminated the disease, and our generation has the chance to eradicate it entirely.

Explore our new page on tuberculosis with global data and trends over time.

Explore global and national data on how energy systems are changing.

Explore global data on cardiovascular diseases, their treatments, risk factors, and trends over time.

Explore our new data and research on pandemics in history and how we can reduce their risk in the future.

Pandemics have killed millions of people throughout history. How many deaths were caused by different pandemics, and how have researchers estimated their death tolls?

Explore global and national data on greenhouse gas emissions and their drivers.

Explore research and data on state capacity.

People are living longer around the world. Explore global data on life expectancy and how it has changed over time.

What do the terms “period” and “cohort” mean in statistics? How do they differ, and why does it matter?

Women tend to live longer than men in all countries — but the sex gap in life expectancy is not a constant.

Explore a major overhaul of our work on child and infant mortality.

Researchers have developed several indices that aim to capture human development. How do they work?

Explore global data on plastics and plastic pollution.

Explore a major overhaul of our work on global education.

There are several ways to capture how common and deadly armed conflicts are. What are they? And when is which measure best?

We have redesigned our interactive visualizations to improve their layout and functionality. Three product and engineering team members discuss the changes and our plans to improve things further.

There are many ways to measure armed conflicts and conflict deaths. What approaches do different researchers take? And when is which approach best?

Death rates decline rapidly after birth but rise again in adolescence. From adulthood onwards, they rise exponentially.

We are very excited to share that Rachel Glennerster and Andrew Dilnot have joined our Board of Trustees.

Our small, dedicated team of experts is building more than a website; our ambition is to build a public good for the world. In this letter, we explain why your support is crucial for us to achieve our mission.