So it is true that the world is ours because the world is Christ's. We have been raised up in Christ to rule with Him in the heavenlies. But that rule is not a ruling by individuals, each clamoring to see how much of the Wild West one can claim for himself.
Frame gets this right -
"There should be among us no spirit of competition or jealousy, but a desire to 'stir up one another to love and good works' (Heb 10:24).
So we practice the faith always in community. Our brothers and sisters play a vital role in building us up in Christ, and their needs have a special call on our compassion. As we have a special responsibility to support our families (1 Tim 5:8), so we should use our resources and gifts to support our Christian brothers and sisters (Gal 6:10)." - Frame, ST, p115