The graphic on top, from nineteenth century's Smith geography textbook, was supposed to show the "types" belonging to a human race, the "Yellow" or "Mongolian" one. Anthropologists today state that such race-based worldview was an invention, and that differences between human groups are actually related to learned cultural behavior.
The much-necessary (for classification purposes) division on groups made here at Ethnoarch.com is based on one such cultural aspect, which is language. This page, accordingly, presents a list of 7,300 or so existing language groups in the world, following the naming and coding classification by SIL's Ethnologue.
See all groups

 

As of June 2007 the participatory interface of the project is being finished. Direct contributions should be possible later this summer. In the meantime, you are welcome to participate by using this form (membership required).