The Kingdom of peace is the promised kingdom of God on earth.
Romans 14:17 For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Spirit.
Jesus is the future king, the Prince of Peace, who is to reign upon the throne of David and bring peace to the earth.
Isaiah 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.7 Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
God has promised him the throne of David and an everlasting kingdom.
Luke 1:32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: 33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
David writes of his reign bringing everlasting peace.
Psalms 72:1 Give the king thy judgments, O God, and thy righteousness unto the king’s son. 2 He shall judge thy people with righteousness, and thy poor with judgment. 3 The mountains shall bring peace to the people, and the little hills, by righteousness. 7 In his days shall the righteous flourish; and abundance of peace so long as the moon endureth.
Isaiah writes of Jesus reigning from Jerusalem and abolishing war in the earth.
Isaiah 2:1 The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem. 2 And it shall come to pass in the last days, that the mountain of the LORD’S house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it. 3 And many people shall go and say, Come ye, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem. 4 And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.
The meek are to inherit a peaceful earth.
Psalms 37:11 But the meek shall inherit the earth; and shall delight themselves in the abundance of peace.
We are encouraged to pray for the peace of Jerusalem, for there will be no peace in the earth until Jerusalem (the city of peace) is at peace.
Psalms 122:6 Pray for the peace of Jerusalem: they shall prosper that love thee. 7 Peace be within thy walls, and prosperity within thy palaces. 8 For my brethren and companions’ sakes, I will now say, Peace be within thee.
Isaiah writes of the preaching of peace through the gospel, that speaks of the coming kingdom of God.
Isaiah 52:7 How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation; that saith unto Zion, Thy God reigneth!
God promises peace to Jerusalem through Isaiah.
Isaiah 66:12 For thus saith the LORD, Behold, I will extend peace to her like a river, and the glory of the Gentiles like a flowing stream: then shall ye suck, ye shall be borne upon her sides, and be dandled upon her knees.
God promises a covenant of peace and a new sanctuary in the midst of Israel through Ezekiel.
Ezekiel 37:26 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore.
Ezekiel is given a conducted tour of this sanctuary and shown the future inheritance of the land of Israel (chapters 40-48).
Haggai writes of this latter Sanctuary and the ensuing peace.
Haggai 2:9 The glory of this latter house shall be greater than of the former, saith the LORD of hosts: and in this place will I give peace, saith the LORD of hosts.
Zechariah writes of the future king who will also be a priest upon his throne.
Zechariah 6:13 Even he shall build the temple of the LORD; and he shall bear the glory, and shall sit and rule upon his throne; and he shall be a priest upon his throne: and the counsel of peace shall be between them both.
The king/priest will bring peace and rule over all the earth.
Zechariah 9:10 And I will cut off the chariot from Ephraim, and the horse from Jerusalem, and the battle bow shall be cut off: and he shall speak peace unto the heathen: and his dominion shall be from sea even to sea, and from the river even to the ends of the earth.
Jesus speaks of the Jews’ lack of understanding about the future peace God has promised.
Luke 19:42 Saying, If thou hadst known, even thou, at least in this thy day, the things which belong unto thy peace! but now they are hid from thine eyes.
By believing and obeying the gospel of the kingdom of God preached by Jesus we become part of this future peace by faith.
Romans 5:1 Therefore being justified by faith, we have peace with God through our Lord Jesus Christ:
Paul writes that the gospel is the gospel of peace in this respect, giving hope of the kingdom to come.
Romans 10:15 And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
Jesus is the one through whom both Jew and gentile can have their part in the future kingdom of peace, being reconciled to God through his sacrifice.
Ephesians 2:14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us; 15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace; 16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: 17 And came and preached peace to you which were afar off, and to them that were nigh.
If we want a part in this future kingdom of peace we must believe and obey the gospel.
I hope you find this helpful.