Fair enough, John! I think we're talking about the same thing but in different ways. Jesus reigns, but we are in a time between the age of the kingdom of the fallen world and the age of the Kingdom of God. And so we must do battle to remain conformed to the reign of God and not to the reign of the world apart from God. In all this, there is some sense in which the devil is the ruler of the world, because the world has not yet been totally redeemed. Not until the Final Judgment. 2 Corinthians 4:4 calls Satan "the god of this age," and John 14:30 calls him "the ruler of this world." Also, 1 John 5:19 says that "the whole world is in the power of the evil one." Catechism #407 says, "By our first parents sin, the devil has acquired a certain dominion over man, even though man is free."

The claim that the devil rules the world doesn't mean that nature should not be loved. It should! It is a wonderful creation of God. Any thoughts? Anyway, thanks for the comment!