Action films have evolved over the decades from adventure films of the 1920s-1930s featuring sword fighting, to war movies of the 1940s-1950s. The James Bond films of the 1960s introduced the resourceful hero who could take on many enemies at once using fighting skills and gadgets. In the 1970s, grittier detective and crime films incorporated more action elements. Modern action films continue to grow the genre, blending genres like science fiction and incorporating fighting styles and martial arts.