Satan began to be bound by Jesus' earthly ministry to Crucifixion...
the sowing of the Gospel progressively bound Satan, who became bound, when the western world converted to Christ under Constantine in the 4th century AD...
then the Prophesied 1000 years occurred = Christian Empire of Christian Roman/Byzantine Empire
Satan is un-bound today, because today is >500 years into the END TIMES, leading up to Rev 20:9+
the (Christian) Millennium ended, with the conquest of the Capitol of Christendom = Constantinople in 1453 AD, nearly 600 years ago
people are DECEIVED today because "Satan" is at work amidst their minds
the Book of Revelation "shot called" human history 2000 years ago...
and the "Babe Ruth pointing to the bleachers" Author thereof, "shot called" completely correctly...
human history has been thralled, to the "Scriptural Schedule" of Revelation, for 2000 years
today = Rev 20:7-9a = End Times