Human brains are generally not great at dealing with scale — at least it’s hard for us to wrap our heads around really big numbers. In the past, we’ve looked at different data visualization methods for scale, ranging from the size of countries to the size of celestial objects. The video below looks at human populations, and presents things at an understandable level by scaling down the world’s population from 7.5 billion to 100 people. These smaller numbers make clearer things like geographical distributions, as well as the deeply problematic levels of wealth inequality that exist. Also of note, more people have cell phones than have toilets.