Kingdom of God
The identification of the kingdom of God with the Church was made by Augustine, who opposed it to ‘the kingdom of the Devil’. Following him, medieval writers tended to equate it with the visible hierarchical church. Modern liberal theologians tend to speak of the kingdom of God generally as that state of human affairs in accord with God's will.
"Kingdom of God." The Concise Oxford Dictionary of World Religions. . Encyclopedia.com. (December 13, 2017). http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/kingdom-god
"Kingdom of God." The Concise Oxford Dictionary of World Religions. . Retrieved December 13, 2017 from Encyclopedia.com: http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/kingdom-god