Who is the most feared human to ever live?

Determining the "most feared human to ever live" is subjective and can vary based on historical context and perspective. Figures like Genghis Khan, known for his brutal conquests and the vast empire he established, or Adolf Hitler, whose regime was responsible for the Holocaust and widespread terror during World War II, are often cited. Fear can stem from military power, political oppression, or mass atrocities. Ultimately, the answer may differ depending on individual interpretations of fear and historical impact.