Between 1513 and 1867, more than 10 million people were brought to the Americas as slaves. It’s a miserable chapter in human history, yet played a disgustingly key role in the creation of the United States. Researchers at Emory University have gathered records from more than 35,000 slavery voyages and created slavevoyages.org, a research tool that allows you not only to download their incredible data set, but also to create your own reports and visualizations.

Of course, it is estimated that between 12 and 27 million people live in slavery in 2010. In absolute numbers, that’s more than at any time in human history. More than 1.3 million children are trafficked every year, and more than 300 million people, mostly women and children, while not considered slaves in the traditional sense, work under conditions of forced labor. We have much to do.