The genre of action films requires over-the-top and seemingly impossible stunts and tricks that appeal to audiences' fantasies. Common elements include firearms, explosions, death, and the villain continually being thwarted by the hero. Action has been a hugely successful genre since the mid-20th century. The genre originated in the 1920s with swashbuckling adventure films starring Douglas Fairbanks. It evolved over decades with varieties appearing, including 1960s James Bond films introducing the suave secret agent archetype. The 1980s saw some of the genre's greatest films like RoboCop and Star Wars released, cementing action as Hollywood's most popular genre led by stars like Arnold Schwarzenegger and Bruce Willis.