The development of the culture of the United States of America - History, Holidays, Sports, Religion, Cuisine, Literature, Poetry, Music, Dance, Visual Arts, Cinema, and Architecture - has been marked by a tension between two strong sources of inspiration: European ideals, especially British, and domestic originality. American culture encompasses traditions, ideals, customs, beliefs, values, arts, and innovations developed both domestically and imported via colonization and immigration. Prevalent ideas and ideals from the European continent such as Democracy, Christianity, and Civil liberties are present as well as those which evolved domestically such as important National holidays, uniquely American sports, proud military tradition, innovations in the arts and entertainment, and a strong sense of national pride among the population as a whole. It includes both conservative elements and liberal elements, military and scientific competitiveness, political structures, risk taking and free expression, materialist and moral elements.