Isaiah 2:3 - And many peoples shall go and say, Come ye, and let us go up to the mountain of Jehovah, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of Jehovah from Jerusalem. -- American Standard Version.
It is often observed how the prevalence of sin continues to increase, and sin is often presented as being good. The tendency of this course of man into greater darkness confirms the teaching of the Bible that the tendency of sin is downward toward deeper degradation and departure from the ways of Jehovah. Ever since the sin of Adam, mankind has been living in what the Bible calls "the present evil age." (Galatians 1:4) The Bible speaks of the world before the flood of Noah's day, how it had become corrupted, and how that world was destroyed. (Genesis 6:11,12; 2 Peter 3:6) The same has been true of the long dispensation since the flood -- the dispensation in which we are now living, which is also to pass away. (2 Peter 3:7,10) Jehovah, however, foreknew the predominance of evil. Jehovah, therefore in His Word has foretold the prosperity of sin for a time, and that "evil doers shall wax worse and worse" (2 Timothy 3:13) until the due time should come when a third dispensation set in the Divine Plan for Messiah's Kingdom shall be inaugurated. Only the powers of the age (dispensation) to come will be sufficient to grapple with and suppress the powers of evil so long entrenched in the earth. And thus it is written, the Messiah shall rule the nations "with a rod of iron" (Psalm 2:9; Revelation 2:27) and then his kingdom will become "the desire of all nations." (Haggai 2:7) At that time, all nations shall learn the ways of Jehovah. -- Isaiah 2:2-4.