
"Combining fast-paced accounts of battles with rich cultural background and the latest scholarship, Frank McLynn brings vividly to life the strange world of the Mongols, describes Temujin's rise from boyhood outcast to becoming Genghis Khan, and provides the most accurate and absorbing account yet of one of the most powerful men ever to have lived."--Provided by publisher.
Genghis Khan was neither a tyrant nor a monarch, nor was cutting off heads a part of his everyday life. He actually got more Mongol people more rights and a higher quality of life.
I would request you to read a detailed and accurate account of his life by a historian.
For example, Genghis Khan: His Conquests, His Empire, His Legacy by Frank McLynn https://amzn.com/B00X2ZW5ZI