Western movies are known for romanticizing stories set in the American West during the 19th century. The genre became popular throughout film history but has diminished as time has passed. Common conventions include a solitary hero character, stunning landscape backdrops, and themes of conquering the wilderness. Over time, the western evolved from early action films to include revenge plots and questions about the treatment of Native Americans. Sub-genres like spaghetti westerns and revisionist westerns further developed the conventions.