X-Men: The Animated Series features X-Men similar in look and line-up to the early 1990s X-Men drawn by Jim Lee. A number of famous storylines and events from the comics are loosely adapted in the series. Beyond faithfully recreating many of the popular characters and stories from the comic books, the series also dealt fairly openly with mature social issues. The ills of prejudice, intolerance, isolation, and racism were all frequent themes in the animated series, as they were in the comics. Anti-mutant prejudice and discrimination was depicted through minor characters as well as more prominent ones, including Senator Robert Kelly, the Friends of Humanity (whose activities and masks in later episodes echoed white supremacy groups such as the Ku Klux Klan) and robotic Sentinels. On the opposite side of the spectrum, Professor Xavier and Magneto, much like their comic-book counterparts, bear similarities to civil rights leaders Martin Luther King Jr. and Malcolm X, respectively. While Xavier advocates non-violence in the struggle for equality, Magneto takes on a more aggressive 'by any means necessary' stance; the duo's differing views are the source of much discussion throughout the series. In 2009, IGN ranked X-Men as the 13th greatest animated show of all time in their Top 100 list, the third-highest standing for a comic book-adapted show on the list.