The action film genre evolved over the 20th century from swashbuckling adventure films of the 1920s-1930s to war and western films of the 1940s-1950s. Alfred Hitchcock helped introduce the spy thriller genre. The success of the James Bond films in the 1960s established the modern action film format featuring a resourceful hero. Urban action films like Dirty Harry emerged in the 1970s alongside James Bond. The 1980s saw the rise of the summer blockbuster action film led by actors like Schwarzenegger, Stallone, and Norris. Modern action films have huge budgets and use new technologies to create realistic adventures that are major box office successes.