Wikipedia is the world's most successful online encyclopedia, now containing 6,080,624 English language articles. It is probably the largest collection of knowledge ever assembled, and is certainly the most widely accessible.
The Wikipedia project strives for a neutral point of view in its coverage of subjects, both in terms of the articles that are created and the content, perspective and sources within these articles. However, this goal is inhibited by systemic bias created by the shared social and cultural characteristics of most editors, and it results in an imbalanced coverage of subjects and perspectives on the encyclopedia.
Wikipedia is an invaluable research tool, and more — and higher quality — references make Wikipedia more reliable and useful. Each year people from around the world join the 1Lib1Ref initiative to make small but meaningful contributions to this goal.