What is the cubs experience of men?

From the text:

The cub had never seen man, yet the instinct concerning man was his. In dim ways he recognised in man the animal that had fought itself to primacy over the other animals of the Wild. Not alone out of his own eyes, but out of the eyes of all his ancestors was the cub now looking upon man—out of eyes that had circled in the darkness around countless winter camp-fires, that had peered from safe distances and from the hearts of thickets at the strange, two-legged animal that was lord over living things. The spell of the cub’s heritage was upon him, the fear and the respect born of the centuries of struggle and the accumulated experience of the generations. The heritage was too compelling for a wolf that was only a cub. Had he been full-grown, he would have run away. As it was, he cowered down in a paralysis of fear, already half proffering the submission that his kind had proffered from the first time a wolf came in to sit by man’s fire and be made warm.