Greek mythology to dominance is frequently called the "Dorian invasion". The Lydian and later the Macedonian kings, as rulers of the same rank, also became Heracleidae. Other members of this earliest generation of heroes such as Perseus, Deucalion, Theseus and Bellerophon, have many traits in common with Heracles. Like him, their exploits are solitary, fantastic and border on fairy tale, as they slay monsters such as the Chimera and Medusa. Bellerophon's adventures are commonplace types, similar to the adventures of Heracles and Theseus. Sending a hero to his presumed death is also a recurrent theme of this early heroic tradition, used in
Greek hero cult began to be told to individuate the persons who were now believed to be buried in these old and imposing sites", observes Robin Lane Fox. Greek hero-cults were distinct from the clan-based ancestor worship from which they developed, in that as the "polis" evolved, they became a civic rather than familial affair, and in many cases none of the worshipers traced their descent back to the hero any longer: no shrine to a hero can be traced unbroken from Mycenaean times. Whereas the ancestor was purely local, Lewis Farnell observed, the hero might be tended in more than one locality,