1. The United States of America
Total Christian Population: 246 780 000
Christianity strongly influenced the country around 16th and 17th centuries. Protestant Reformation was led by Martin Luther, among others, through the puritans and pilgrims from England. According to the Boisi Center, volunteerism is the most influential aspect of American culture in religious practice. As Christian faith then has been common that parents handed down their beliefs to their children, most Americans now understand the importance of volunteerism in Christianity. As a member of a faith community, one understands that his faith is chosen by no one but him. Recently, a report from Pew Research Center identified that the Christian population in the country was diminished by about 5 million. But despite of this fact, United States is still the number one among the 11 countries with highest Christian population.