Collectively encompassing more than 900 million adherents, or nearly forty percent of Christians worldwide, Protestantism is present on all populated continents.[t] The movement is more divided theologically and ecclesiastically than either Eastern Orthodoxy or Roman Catholicism, lacking both structural unity and central human authority. Some Protestant churches do have a worldwide scope and distribution of membership (notably, the Anglican Communion), while others are confined to a single country, or even are solitary church bodies or congregations (such as the former Prussian Union of churches). Nondenominational, evangelical, independent and other churches are on the rise, and constitute a significant part of Protestant Christianity.