Biography Of Genghis KhanBiography of GenghisKhan The old world had many great leaders. Alexander the Great, Hannibal and even Julius Caesar met with struggle on their rise to power. Perhaps GenghisKhan was the most significant of all these rulers. To prove that GenghisKhan was the greatest ruler, we must go back to the very beginning of his existence. We must examine such issues as; Genghis?s struggle for power/how his life as a child would affect his rule, his personal and military achievements and his conquests.