The Unz Review:ㅤElon Musk Goes to Canossa, by Ron Unz Although unknown to almost all present-day Americans, Emperor Henry IV was one of the most powerful European monarchs of his day. Under his twenty year reign, the Holy Roman Empire of the High Middle Ages governed Germany, the Low Countries, much of Italy, and other important lands, with many considering him heir to the fabled Charlemagne. With the arrogance that came from holding such enormous temporal power and commanding large armies, he challenged the