In the early Middle Ages, missionary activities spread Christianity towards the west among German peoples. During the High Middle Ages, eastern and western Christianity grew apart, leading to the East–West Schism of 1054. Growing criticism of the Roman Catholic ecclesiological structure and its behaviour led to the Protestant movement of the 16th century and the split of western Christianity. Since the Renaissance era, with colonialism inspired by the Church, Christianity has expanded throughout the world. Today there are more than two billion Christians worldwide, and Christianity has become the world's largest religion. Within the last century, as the influence of Christianity has waned in the West, it has rapidly grown in the East and the Global South; in China, South Korea and much of sub-Saharan Africa.