From aboutad 400 onward, Augustine attacked not only the popular, anarchistic variety of millennialism that his fellow Church Fathers reviled but also the hierarchical, authoritarian kind that Eusebius and others so ardently embraced. He did so by presenting history as operating in two different realms—the heavenly and the terrestrial—outlined in his treatise The City of God (413–426 ce). The heavenly city, the expression of spiritual perfection and union with God, was not visible to those still in the terrestrial city, where good and evil continued to coexist in a single body. Millennial perfection could not be achieved in this world. ...(100 of 15275 words)