Poverty, disease, hunger, climate change, war, existential risks, and inequality: The world faces many great and terrifying problems. It is these large problems that our work at Our World in Data focuses on. Our World in Data publishes an open-access publication where users can understand the state of the world today, where we are making progress and where we are falling behind. Through interactive data visualizations we can see how the world has changed; by summarizing the scientific literature we can understand why. We cover everything from global poverty to natural disasters, education and health; we have 3405 charts across 297 topics. Our World in Data is free, open-source and provided as a public good. It has millions of users every month, and is cited in research and media across the world every day. This allows millions of people to understand the large problems the world is facing, and how we can solve them.