“Our Father in heaven,
hallowed be your name.
10 Your kingdom come,
your will be done,
on earth as it is in heaven.
11 Give us this day our daily bread,
12 and forgive us our debts,
as we also have forgiven our debtors.
13 And lead us not into temptation,
but deliver us from evil.
Your Kingdom Come
This request in the Lord’s Prayer is a prayer that others would see that they are not the masters of their own fate and the captains of their own souls. It is to step off the throne and ask God to take His rightful place on it. 
This is a prayer that we remember who is in charge. We sometimes pray as if we know all the answers and all God has to do is give us what we ask for. We know what is best. We know what we need. We are telling Him what to do instead of asking Him to act. But that is not how to pray. We pray that He would cause HIS Kingdom to come. And it needs to come in our own understanding of who really is the King.
How easy it is for us to treat God’s kingdom as our turf. We think of the ministries we lead as MINE. We talk and think of OUR church, OUR worship, … “Let me talk to you about what the Lord is doing in MY LIFE” The cure for such a misplaced attitude is prayer. This is about a reigning King having absolute rule and absolute authority. No votes, no opinion polls, no consensus … He is King. We are subject. He leads and we follow. He commands and we obey. 
“Cause your rule to be a reality in our lives and the lives of the people of the world.” We are commanded here to pray for the salvation of the lost and the growing edification of the church. It is a prayer that God rule in the world, in people’s hearts and more obviously in the lives of those who are His already. Tomorrow when you do your Bible reading and prayer time before you go to work will you pray that God’s Kingdom come? Pray that it come into the lives of those you stand at the bus stop with and those you work with and those you teach and those you rub shoulders with in whatever capacity.
Note it well – Jesus says this is how we are to pray. The salvation of lost people is designed, in the sovereign purposes of God, to come to pass in answer to prayer. People will not become citizens of God’s kingdom through faith in Jesus Christ if we do not pray for them to be saved. “Here is how you should pray” Jesus says and then says “pray for people to be saved” – and they will not be if we do not pray for them.
And this is a prayer that Jesus return and put an end to all the sin and debauchery and idolatry and abuse and hardship and suffering. It is a prayer that Jesus return with King of Kings and Lord of Lords written on His thigh and slay the author of sin and lies and cast him into the bottomless pit where he belongs. This is a prayer to want Jesus to come back more than you want anything else in the world.