Time period following the death of Alexander the great during witch Greek culture spread throughout the known world

Hellenistic World

Explanation:

The Hellenistic World (from the Greek word Hellas for Greece) is the known world after the conquests of Alexander the Great and corresponds roughly with the Hellenistic Period of ancient Greece, from 323 BCE (Alexander's death) to the annexation of Greece by Rome in 146 BCE.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.