Pyrrho (c. 360 B.C.E. - c. 275 B.C.E.), a Greek philosopher from Elis, was credited in antiquity as being the first skeptic philosopher and the inspiration for the school known as Pyrrhonism. His followers adopted the label "zetetic" (Greek meaning "seeker") and stressed the importance of observation and personal experience as a path to truth claiming that man can only know the world as it appears to him. This approach had a heavy influence on members of the Flat Earth movement of the 19th Century, many of whom adopted the label for themselves, forming the Universal Zetetic Society.