How did hellennistic culture start?

Macedonia was a kingdom located north from Greece.King phillip the second takes over Ancient Greece. Then Phillip the 2nd is killed in his daughters wedding by one of his body guards.So then Alexander the grat takes over king phillip the second.Alexander the great keeps taking over and doing his job in the lands of Persia, Egypt and India.All the culter that were taken over were combined to a new culture named Hellenistic culture.