He-Man and the Masters of the Universe a "life lesson" or "moral of the story" at the end of each episode. This moral was usually directly tied to the action or central theme of that episode. The show was so successful that it spawned a spin-off series, "", following the adventures of He-Man's sister, Princess Adora. Mattel's subsequent attempts to relaunch the He-Man toy line also led to the short-lived sequel series "The New Adventures of He-Man" in the early 1990s, and an update of the series for a contemporary audience in 2002. It is also noted for featuring early script-writing work from J. Michael Straczynski, later
The Cartoon History of the Universe enliven his subject. He reports both the greatness of human achievement and acknowledges humanity's savagery. In addition to being a straight (though unusual) history, "The Cartoon History" helps readers understand historical cause and effect—how the past relates to the present. It explains the motivations behind human beings' discoveries, inventions, explorations, wars, triumphs, and mistakes. Gonick's editorial aim seeks to do justice to every point of view. Gonick consistently uses elements of satire to find the most humor in every situation. For example, one cartoon panel depicts the barbarism of a group of Huns who had elephants herded off a cliff