Are we happier when we spend more time with others? Studies suggest social relations are a key factor in happiness & life satisfaction. We take a closer look at the evidence for how much social connections matter for happiness.

Loneliness has been reported to be as lethal as ’15 cigarettes a day’. What is the evidence for this? We take a deeper look at the data and research on the link between loneliness and health and wellbeing.

The UN projects that the world population will increase from 7.7 billion today to 10.9 billion by 2100. Most of this growth will come from Africa; its share of the world population will rise from 17% to 40%. More than 8-in-10 people will live in Asia or Africa by the end of the century.

An online data appendix explaining the data and methods used to estimate the historical poverty trends presented in Roser and Hasell (2021)

Many lecturers and teachers use Our World in Data in their teaching. This spans a range of levels from primary school to post-graduate university education. Matthew Cone, a US high-school teacher shares how he uses OWID with his pupils.

Our World in Data gets lots of feedback on how our work is used by policymakers, journalists, researchers and the public. But sometimes we get feedback from people who use us in ways we could never have imagined. Dr Jill Gordon shares her experiences on how she uses OWID in her work as a medical doctor.

South Koreans are on average 32-times richer than in 1950; Romanians 20-times; Chinese 16-times. Other countries stagnated and remained poor. We look at how incomes have changed around the world and why it matters.

There is a cross-country correlation between democracy (elections, freedom of expression, equality before law etc.) and population health. We take a look at these correlations and whether there is good evidence to suggest causality.

50 years ago the average woman in world had five children. Since then, this figure has more than halved. Yet the global population is still rising – why is this the case?

5 million children under 5 die every year – that’s 14,000 every day. Yet this is an everyday tragedy that never makes the headlines.

The human population has been a young one for most of its history: high fertility rates and short lifespans mean children have accounted for a large share of the population. But the world is ageing: there are now more people older than 64 than younger than 5 years old. This marks a historic demographic change.

How hard is it for women to make it to the top? Research using income tax data from a number of high-income countries casts light on this. Although improving, we see that women are still very under-represented at the top of the income distribution.

Where do we find life on earth? Despite being vast, the oceans are home to just 1% of life – but the majority of animals. See how the different lifeforms are split across these global environments.

The last few decades have been extraordinarily successful in the fight against malaria. But we still need to – and can – do much more. See our global progress & why GiveWell recommends to donate to organizations that fight malaria.

How is life on Earth distributed across the taxonomic kingdoms? Humans make up just 0.01% of life: but we’ve had much larger impacts on shaping the animal kingdom. Livestock now outweighs wild mammals and birds ten-fold.

15,000 children die on average every single day. Reducing child mortality is a key target of the Sustainable Development Goals (SDGs). What would it take for the world to reach it?