Mail art (also known as postal art and correspondence art) is a populist artistic movement centered on sending small scale works through the postal service. It initially developed out of the Fluxus movement in the 1950s and 60s, though it has since developed into a global movement that continues to the present. The American artist Ray Johnson is considered to be the first mail artist, and the New York Correspondence School that he developed is considered the first self-conscious network of mail artists.