Matthew 24:14 And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
This gospel of the kingdom is not your ordinary run of the mill gospel, neither is it the prosperity gospel which so many of the popular majority subscribe to. The word “This” is a pronoun that is used to identify a specific thing or person such as: “Is this your bag? Or "is this your Bible?"
Therefore, when Jesus speaks of “This gospel of the kingdom, He must be referring to a particular aspect of the Gospel, that would be pertinent to the now generation, for He specifically says that the end will come soon after that aspect of the gospel has been preached in all the world.
It is obvious, that Christ was speaking in the context of earth’s final crisis, thus, the aspect of the gospel which pertains to our generation in particular, is the one that features in a prominent manner, the laws and commandments of God and the true worship of God, for here is where contemporary Christianity is lagging far behind.
Revelation 14:6 And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people, 7 Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
May The Lord add His blessing to the study of His word. God bless!