I'm all for social justice. I'm passionate about it. Christians have to be serving people and loving them not just in word but in deed. But man, if I hear another well-fed, Toms-wearing evangelical kid quote St. Francis ("preach the Gospel always, and if necessary, use words") one more time as a justification for their unwillingness to utter a word to anyone about Christ as the one true hope, I don't know what I'll do.
For many eschatology-minded Christians, one of the "signs" that the end of the world (i.e. the return of Christ) is upon us will be a great "end times harvest" of souls... a great awakening across the globe in which the gospel spreads at a rate far greater than ever before, and all corners of the globe hear the name of Jesus. Based on verses like Matt. 24:14, many believe that Christ's return will only come when this "proclaimed throughout the whole world" thing happens.