John observes that the four bound evil angels, used to carry out God's judgment, were limited to kill 1/3
of the world's population. In consideration of the Fourth Seal, in which 25% of the population was killed, the
death of 1/3 of the surviving 75% leaves at most 50% of the original population before the First Seal was
broken.
The surviving human beings do not recognize that the plagues confirm the existence of God, do not turn to
Him, and are unrepentant.
This likely indicates that, at the end of the period defined by the Sixth Trumpet, there are few Believers
on earth left to evangelize and testify of God. And the Seventh Trumpet will sound soon…