Mac Tonnies (20 August 1975 – 22 October 2009) was an American author and blogger whose work focused on futurology, transhumanism and paranormal topics. Tonnies grew up in Independence, Missouri, and attended William Chrisman High School and Ottawa University. He lived in Kansas City, Missouri. Tonnies had an active online presence and a "small, but devoted" readership, but supported himself by working at Starbucks and other nine-to-five jobs. In 2009 he died of cardiac arrhythmia at the age of 34.