When did the Hellenistic period begin? Explain the reason for the spread of the Greek culture.

Answer:323 BC - 30 BC

In consequence, the Hellenistic Period is usually accepted to begin in 323 BC with Alexander's death and ends in 31 BC with the conquest of the last Hellenistic kingdom by Rome, the Lagid kingdom of Egypt. For the Asian part, we could lengthen it to 10 BC, when the last Indo-Greek kingdom was conquered by Indo-Sakas.