In a nut shell, I find we are at the ' final phase' of Matthew 24:14 about spreading the international good news of God's kingdom (Daniel 2:44) being done now on a global scale as never before in history.
As a thief comes by surprise, that is how surprisingly Jesus will come.
The international proclaiming about God's kingdom government means we are nearing the ' final signal ' of 1 Thessalonians 5:2-3 when the ' powers that be ' will be saying, " Peace and Security..." which will prove to be the precursor to the coming great tribulation of Revelation 7:14,9 before Jesus takes the action as mentioned at Isaiah 11:3-4; Revelation 19:14-16 so his action will Not be missed.
By the mid 1800’s the Bible had been spread to ever continent - worldwide.
As people are born and die there will always be people the Bible ‘has not reached ‘. But this is not referring to that but that the Gospel would have extended its reach internationall to reach all the world.
M. H. Goyer writes in his book on prophetic fulfilment: “The British and
Foreign Bible Society (for one example) has issued, since its foundation in
1804, over 421 million copies of the Scriptures, in practically every country
known throughout the globe.”
In Our Day in the Light of Prophecy, Spicer wrote that the Gospel in his
day had been spread ‘to ninety-five per cent of the inhabitants of the earth.’ He
added: “It was in 1842 that five treaty-ports in China were open to commerce
and to missions—advance steps in the opening of all China to the Gospel. In
1844 Turkey was prevailed upon to recognise the right of the Moslems to
become Christians, reversing all Moslem tradition. In 1844 Alan Gardiner
established the South American Mission. In 1842 Livingstone’s determination
was formed to open the African interior.”
Dr A. T. Pierson in Modern Mission Century wrote: “India, Siam, Burma,
China, Japan, Turkey, Africa, Mexico, South America … were successively
and successfully entered. Within five years, from 1853 to 1858, new facilities
were given to the entrance and occupation of seven different countries, together
embracing half the world’s population.”
There were many additional references which made it clear that the Gospel
of Christ, and its teachers, had entered every continent by the year 1844,
spreading the Word of Jesus the Christ throughout the world.
This was considered by the students of Scripture to be in exact fulfilment
of the words of Christ given in Mark.