I have been out of the loop for a long time, but apparently Ariella Elema is leaning towards the idea that as book-educated lawyers in Italy France and England turned against duels and trial by battle, men started to appeal to the right of soldiers to settle their disagreements for themselves or under the supervision of a senior soldier. One reason fencing training in northern Italy had to be versatile was that the person who chose the weapons could chose any weapons customary amongst soldiers. So if there was a tradition in the HRE north of the Alps of claiming the right to commit violence in defense of the honour of a citizen / landowner, that would be a different world.