Why alexander is called the great?

Basically, he earned that title. The man was a military genius who was undefeated in battle. In just over a decade, he created one of the largest empires of the ancient world. It stretched all the way from Greece to northwest India. But it wasn't just about conquest. He spread Greek culture and ideas everywhere he went, creating a new Hellenistic world. His legacy was simply immense and it shaped history for centuries to come.