That happened in the 13th century in the European city of Gubio in the Italy. That very special man who talked to the wolf was Saint Francisco. Looking at that story as home-brewed wolf behaviourist I must say that that lone wolf must have been very special wolf and that man was indeed very special Man as well. Wolves attack sheep and cattle sometimes but attack on the people is very, very rare. Wolves learn who humans are and how dangerous they are in very early age.
Wolves try to avoid people if they only can.
If they can not run away wolves are sometimes so frightened that they do not fight. They loose fear and when wrongly handled they can bite or even kill people. Wolves are predators and their instincts make them attack in some situations. Also relations in the pack are not the same to those of the human behaviour. Their ideas of ownership is completely different from ours.