The descent into darkness described in the first chapter of Romans is primarily a description of mankind as a whole, or individual countries or cultures, because the slide into paganism happens corporately. Nations or peoples do it together, and that is a major reason that it has such power when it gains control. It starts with a knowledge of God. Man did not start out as pagan, he started out fellowshipping with God in the Garden of Eden. Then when Noah got off the ark, everyone who was alive on the earth was very familiar with God and his ways. Something happened since then, and this message is about the slide into paganism, and the fact that we are witnessing it in this generation.