Steven Allan Spielberg (born December 18, 1946) is an American filmmaker. Spielberg is considered as one of the leading protagonists of the New Hollywood cinema, as well as being viewed as one of the most popular and influential directors and producers in film history. In a career spanning more than four decades, Spielberg's films have covered many themes and genres. Spielberg's early science-fiction and adventure films were seen as archetypes of modern Hollywood blockbuster filmmaking. In later years, his films began addressing humanistic issues such as the Holocaust, the transatlantic slave trade, war, and terrorism. He is one of the co-founders of DreamWorks Studios.