As explained in those publications, it referred to Jehovah’s new system of things—a new human society ruled over by God’s heavenly Kingdom in the hands of Jesus Christ. (Dan. 7:13, 14; 2 Pet. 3:13)
... From the Bible, those publications showed that in the new world, the earth will become a paradise; humans will live at peace with the animals; wars will cease; earth’s abundance will be available to everyone; sickness and death will be no more; even the dead will be raised and given the opportunity to live forever.—Ps. 67:5, 6; Isa. 2:4; 11:6-9; Luke 23:43; John 5:28, 29; Rev. 21:3, 4.