Olympia's royal ancestry traced back to the hero Achilles, and the blood of Helen of Troy was believed to run… — Robin Lane Fox

Supported the belief that he was the Greek gos Zeus's son.

Alexander was not the first Greek to be honoured as a god for political favour...

"War", Philip had announced, "was being declared against the Persians on behalf of the Greeks, to punish the barbarians for their lawless treatment of the old Greek temples".