Jesus warned that such blindness would characterize humanity before His return. In Matthew 24:37-39, He compared the days of Noah to a future time when people would be unaware of the approach of another time of worldwide judgment, that of the seven-year Tribulation.
The Unfolding Drama of the Last Days
When I was in college fifty years ago, I believed the Rapture could happen at any moment. Since then, like the cutting away of layers of an onion, we have seen an unfolding of world events that have not only confirmed the nearness of the Tribulation and thus to the Rapture, but have also enabled us to better understand the fulfillment of events during the Tribulation.