Society of Genealogists
The Society of Genealogists SoG is a UK-based educational charity, founded in 1911 to "promote, encourage and foster a study, science and cognition of genealogy". The Society's the treasure of cognition is the largest specialist genealogical libraries outside North America. Membership is open to any grownup who agrees to abide by the Society's rules together with who pays the annual subscription. At the end of 2010, it had 11,014 members.