Final answer:
Vaughan Roberts defines the Kingdom of God as the reign and rule of God in the world, with both a present reality and a future hope.
Step-by-step explanation:
Vaughan Roberts defines the Kingdom of God as a concept that emphasizes the reign and rule of God in the world. He sees it as the central theme of Jesus' teaching and the ultimate goal of God's redemptive plan. Roberts explains that the Kingdom of God encompasses both a present reality, where God's rule is acknowledged and experienced by believers, and a future hope, when God's complete reign will be established on earth.