Simplified Rules of Order. Before a meeting can conduct business it requires a quorum--the minimum number of members who must be present at the meeting before business can be legally transacted. The requirement of a quorum is a protection against unrepresentative action in the name of the association by an unduly small number of people.
Extra credit: Sandburg volunteered for the U.S. Army and served in Puerto Rico (but did not see combat) during the Spanish-American War of 1898... Sandburg was married to Lillian Steichen, sister to the photographer Edward Steichen, from 1908 until his death in 1967...
Einstein married Elsa Lowenthal (nÃ©e Einstein) on 2 June 1919, after having had a relationship with her since 1912. She was his first cousin maternally and his second cousin paternally. Einsteins first wife was Mileva Maric, they married in 1903; had two sons (Hans Albert and Eduard) and divorced in 1919. His second wife was Elsa Lowenthal; they married in 1923 and she died in 1936. They had no children togehter but Einstein adopted Elsa's two daughters (Ilse and Margot) by a previous marriage. Albert Einstein's second wife, Elsa Lowenthal, was his first cousin on his mother's side.