How does a displaced fracture heal naturally without medical treatment?

Today's episode comes from one of the YouTube viewers Doc On The Run YouTube channel who had watched one of the videos on fractures. He asked a great question.

This is from Saif. What he said was, 

"Thank you for such a short and effective, informative video. My question was, does displaced fracture heal naturally without medical treatment? And the thought process was that how did our ancestors and primitives heal without medical care or deal with these displaced fractures?"

How does a displaced fracture heal naturally without medical treatment? 

Well, that's what we're talking about today on the Doc On The Run Podcast.