People are thinking that "God is dead. We have no obligation to God. There is no God." This sort of thinking will never make the people happy. And actually, it is happening. They have become atheistic. The modern civilization is Godless, but people are not happy. Therefore God or His representative comes when people forget his relationship with God.
Lecture on Bhagavat-Gita 4.7, Montreal, 13 June, 1968