Mark Gruenwald became the writer of the series with issue #307 (July 1985) and wrote 137 issues for 10 consecutive years from until #443 (Sept. 1995), the most issues by any single author in the character's history. Gruenwald created several new foes, including Crossbones and the Serpent Society. Other Gruenwald characters included Diamondback, Super Patriot, and Demolition Man. Gruenwald explored numerous political and social themes as well, such as extreme idealism when Captain America fights the anti-nationalist terrorist Flag-Smasher; and vigilantism when he hunts the murderous Scourge of the Underworld.