The correct answer to this open question is the following.
After Alexander's death, the Hellenistic Era helped spread Greek ideas and culture. Indeed, a new Greek culture spread throughout the lands Alexander had conquered.
Alexander’s attempt to make his empire secure help lead to the Hellenistic Age in that he not only looked after the empire as a territory to be dominated but he cared about the spread of the Greek ideas and culture to influence their conquered territories.
After the death of Alexander, the Hellenistic culture started to blend with other cultures in Asia and Africa. After his conquests, Alexander respected the conquered cultures and allowed people to maintain their beliefs, so people thanked that chance and they were more receptive to the Greece influence.
From what today is Pakistan to the Middle East and Mediterranean region, the Hellenistic period influenced these lands with the beauty of the Greek culture, art, literature, and architecture.