The ruling dynasties of the Hellenistic world were Macedonian, and Macedonians and Greeks filled all the important political, military, and diplomatic positions. Besides building Greek cities, Hellenistic kings offered Greeks land and money as lures to further immigration.

The Hellenistic monarchy, unlike the Greek polis, did not depend solely on its citizens to fulfill its political and military needs, but instead relied on professionals. Talented Greek men had the opportunity to rise quickly in the government bureaucracy. Appointed by the king, these administrators did not have to stand for election each year, unlike many officials of Greek poleis. Greeks also found ready employment in the armies and navies of the Hellenistic monarchies. Hellenistic kings were reluctant to arm the local populations or to allow them to serve in the army, fearing military rebellions among their conquered subjects. The result was the emergence of professional armies and navies consisting primarily of Greeks, although drawn from many areas of Greece and Macedonia, not simply from one polis. Unlike the citizen hoplites of classical Greece, these men were full-time soldiers. Hellenistic kings paid them well, often giving them land or leasing it to them as an incentive to remain loyal.

Greeks were able to dominate other professions as well. Hellenistic kingdoms and cities recruited Greek writers and artists to create Greek literature, art, and culture. Greek architects, engineers, and skilled craftsmen found themselves in great demand to produce the Greek-style buildings commissioned by the Hellenistic monarchs. Architects and engineers would sometimes design and build whole cities. An enormous wave of construction took place during the Hellenistic period.

Increased physical and social mobility benefited some women as well as men. More women learned to read than before, and they engaged in occupations in which literacy was beneficial, including care of the sick. During the Hellenistic period, women continued to be required to have male guardians to buy, sell, or lease land; to borrow money; and to represent them in other commercial transactions. Yet often such a guardian was present only to fulfill the letter of the law. The woman was the real agent and handled the business being transacted.

Because of the opportunities the Hellenistic monarchies offered, many people moved frequently. Once a Greek man had left home to take service with, for instance, the army or the bureaucracy of the Ptolemies, he had no incentive beyond his pay and the comforts of life in Egypt to keep him there. If the Seleucid king offered him more money or a promotion, he might well accept it and take his talents to Asia Minor. Linguistic changes further facilitated the ease with which people moved. Instead of the different dialects spoken in Greece itself, a new Greek dialect called the koine (koy-NAY), which means “common,” became the spoken language of traders, the royal court, the bureaucracy, and the army across the Hellenistic world.

As long as Greeks continued to migrate, the kingdoms remained stable and strong. In the process they drew an immense amount of talent from the Greek peninsula. However, the Hellenistic monarchies could not keep recruiting Greeks forever, in spite of their wealth and willingness to spend lavishly. In time, the huge surge of immigration slowed greatly.