Why is the extension of Christ's kingdom important for Christians?

The extension of Christ's kingdom is foundational to the mission of the Church and essential for Christian hope. It signifies the realization of God's promises, as He has promised to establish a kingdom where His righteousness prevails. Isaiah 60:12 states that 'the nation and kingdom that will not serve Thee shall perish', highlighting the significance and ultimate authority of Christ's kingdom over all nations. As this kingdom expands, it brings with it the hope of an era characterized by peace, reconciliation, and the eradication of sin's consequences. Christians are called to be co-laborers in this mission, participating in the proclamation of the Gospel and the transformation of lives, as every individual brought into this kingdom contributes to the overall glory of God.