American architect, systems theorist, author, designer, inventor, and futurist Buckminster Fuller kept an extremely detailed log of his life from 1920 until his death in 1983. The log, which he called the Dymaxion Chronofile, is a documentation of his life every 15 minutes and includes copies of all his correspondence, bills, notes, sketches, and newspaper clippings—the sum collection is estimated to be, if stacked up, 270 feet (80 meters) tall. It is said to be the most documented human life in history.