You may be closer to a complete stranger than you may think. Stanley Milgram popularized the six degrees of separation concept in his 1967 study. As it turns out, a 2011 study conducted by The University of Milan and Facebook shows that there are only 4.74 degrees of separation between you and a total stranger. The study said, ". . . a friend of your friend knows a friend of their friend."
Theoretically, if I told my friend, who told his friend about Christ, without interruption in the chain, after everyone told 5 people, the world would hear. If only good news traveled as fast as bad news. --Jim L. Wilson
Spirit 2012, p 36
Matthew 28:18-20 (YLT) (18) And having come near, Jesus spake to them, saying, `Given to me was all authority in heaven and on earth; (19) having gone, then, disciple all the nations, (baptizing them--to the name of the Father, and of the Son, and of the Holy Spirit, (20) teaching them to observe all, whatever I did command you,) and lo, I am with you all the days--till the full end of the age.'