A fraternal society that was established between the 16th and 17th century, Freemasonry has over six million members today and remains actively engaged in the conduct of charitable works in the secluded communities of Scotland and England. Its members uphold the constitution drafted by Scottish minister James Anderson, where the establishment of fraternal friendship is central.
11. P.E.O. Sisterhood
A women’s organization with about 250,000 members in the United States and Canada, P.E.O. Sisterhood was organized on January 21, 1869 to provide opportunities for education to all its female members around the world. The society has organized chapters in the United States and Canada and is known for being the second sorority to have ever been formed in the United States. Currently headquartered in Iowa, Canada, P.E.O. Sisterhood maintains its traditions of secrecy even after its “It’s OK to talk about P.E.O.” campaign in the 20th century.