As in the Days of Noah

Jesus said, "as the days of Noah were, so also will the coming of the Son of Man be" (Matthew 24:37). In other words, the conditions of the world before the coming of Jesus will be like the conditions of the world before the flood:

- Exploding population (Genesis 6:1)

    And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,

- Sexual perversion (Genesis 6:2)

    That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.

- Constant evil in the heart of man (Genesis 6:5)

    And GOD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.

- Widespread corruption and violence (Genesis 6:11)

The earth also was corrupt before God, and the earth was filled with violence.

Then when lust hath conceived,
 it bringeth forth sin: 
and sin, 
when it is finished, 
bringeth forth death.

James 1:15