When it is said that Christ died "not for our sins only but for the sins of the whole world," 1 John 2:2, or that He came to "save the world," John 12:47, the meaning is that not merely Jews but Gentiles also are included in His saving work; the world as a world or the race as a race is to be redeemed.
Sometimes the term "world" is used when only a large part of the world is meant, as when it is said that the Devil is "the deceiver of the whole world," or that "the whole earth" wonders after the beast, Revelation 13:3. If in 1 John 5:19, "We know that we are of God, and the whole world lieth in the evil one," the author meant every individual of mankind, then he and those to whom he wrote were also in the evil one, and he contradicted himself in saying that they were of God. Sometimes this term means only a relatively small part of the world, as when Paul wrote to the new Christian Church at Rome that their faith was "proclaimed throughout the whole world," Romans 1:8. None but believers would praise those Romans for their faith in Christ, and in fact the world at large did not even know that such a Church existed at Rome. Hence Paul meant only the believing world or the Christian Church, which was a comparatively insignificant part of the real world. Shortly before Jesus was born, "There went out a decree from Caesar Augustus that all the world should be enrolled,"..."and all went to enroll themselves," Luke 2:1, 3; yet we know that the writer had in mind only that comparatively small part of the world which was controlled by Rome. When it was said that on the day of Pentecost, "there were dwelling at Jerusalem Jews, devout men, from every nation under heaven," Acts 2:5, only those nations which were immediately known to the Jews were intended, for verses 9-11 list those which were represented. Paul says that the Gospel was "preached in all creation under heaven." Colossians 1:23. The goddess Diana of the Ephesians was said to have been worshipped by "all Asia and the world," Acts 19:27. We are told that the famine which came over Egypt in Joseph's time extended to "all the earth," and that "all countries came into Egypt to Joseph to buy grain," Genesis 41:57.