“the Fall of the Roman Empire”
Where did you get that?
http://www.shortercatechism.com/resources/wsc/wsc_007.html
Westminster Shorter Catechism
Question 7
Q: What are the decrees of God?
A: The decrees of God are, his eternal purpose, according to the counsel of his will, whereby, for his own glory, he hath foreordained whatsoever comes to pass.
God foreordained it and since immorality is rampant again what has He in store next for this world?