Steven Allan Spielberg (born December 18, 1946) is an American film director, screenwriter, producer, and studio entrepreneur. In a career of 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 considered one of the most popular and influential filmmakers in the history of cinema. He is also one of the co-founders of DreamWorks movie studio.