Then comes the end, when he delivers the kingdom to God the Father, after destroying every rule and every authority and power. (1 Corinthians 15:24)
 
How far does the reign of Christ extend?
The next verse, 1 Corinthians 15:25 says, “He must reign until he has put all his enemies under his feet.” The word all tells us the extent. 
So does the word every in verse 24: “Then comes the end, when he delivers the kingdom to God the Father after destroying every rule and every authority and power.”
There is no disease, no addiction, no demon, no bad habit, no fault, no vice, no weakness, no temper, no moodiness, no pride, no self-pity, no strife, no jealousy, no perversion, no greed, no laziness that Christ will not overcome as the enemy of his honor. 
And the encouragement in that promise is that when you set yourself to do battle with the enemies of your faith and your holiness, you will not fight alone.
Jesus Christ is now, in this age, putting all his enemies under his feet. Every rule and every authority and every power will be conquered. 
So, remember that the extent of Christ’s reign reaches to the smallest and biggest enemy of his glory in your life, and in this universe. It will be defeated.
– John Piper