Source:Ancestry.com - OneWorldTree

Usage Tips

This is a user-contributed tree on Ancestry that attempts to merge everyone's data into "one" tree. However, the matching mechanisms are (for understandable reasons) designed loosely, and errors are rampant. Correcting errors is very difficult, because the system essentially allows users only to "vote" for the correct information. Removing incorrect information is difficult, and there is no way to add notes or sources to explain why one set of information is more reliable than another. It's reliability is thus similar to Ancestral File, but perhaps even worse, as the ease of uploading information on the internet (the primary way OneWorldTree finds data) is so easy, and thus "bad" information is repeated more readily.