One of the worst effects of original sin is the turning of human beings against one another. The most common type of violence against one another are things we say. Sins of speech against one another are a terrible problem. In the Catechism of the Catholic Church, we find that a person is guilty of a particular sin of the tongue called calumny when he says something “contrary to the truth, harms the reputation of others and gives occasion for false judgments concerning them.” (CCC #277)
In his book of the three greatest prayers, St. Thomas Aquinas takes up the question of polytheism in his day. Aquinas states that if you love other things before God, you have slipped into a kind of polytheism. If you look at the list of 5 false Gods given by St. Thomas Aquinas, and you look at the new Gods that have arisen in our time (money, possessions, recreation, sports), it would be surprising if we did not find at least one that has, quite quietly, but very powerfully, become a God in our our lives.