So once leaders turn their backs on truth, advocating lies, this results in that society exhibiting and experiencing far more wickedness, bitterness and hatred ending in a growing callousness toward one another. Eventually, sin ceases to be called sin. It is embraced as good and that society begins living a  Romans 1 life. Even while doing that, it still often sees itself as "innocent" of being evil in spite of the many examples from that society that exist on a daily basis. These become actually willfully indulged in by many to most within that populace. Once the rejection of God's morality is complete, there is little left except for God to judge that nation.