The book was created by Stan Lee and Jack Kirby, met with a lukewarm reception, and was eventually cancelled in 1970. Interest was rekindled with 1975's Giant-Size X-Men and the debut of a new, international team. Under the guidance of writer Chris Claremont, whose 16-year stint began with August 1975's Uncanny X-Men #94), the series grew in popularity worldwide, eventually spawning a franchise with numerous spin-off "X-books", including New Mutants, X-Factor, Excalibur, X-Force, Generation X, the simply titled X-Men, and a number of prefixed titles such as Astonishing X-Men and New X-Men.
The series concluded after the "X-Men: Schism" miniseries, with #544 in October 2011. A new Uncanny X-Men volume, starting at number #1, depicted the X-Men that stayed in San Francisco under Cyclops's leadership. As part of Marvel NOW! relaunch of Marvel titles, the second volume concluded with #20 (October 2012). It was replaced by a new flagship title, All-New X-Men in November 2012. A new volume of Uncanny X-Men featuring Cyclops's team will be launched in February 2013, written by Brian Michael Bendis with artwork by Chris Bachalo.