Acusilas is arguably the oldest mythographer. He is supposed to have written on bronze tablets, which, if true, would have limited the circulation and survivability of his many works. True enough: these (on the subject of mythic genealogies) survive only in fragments quoted and referenced by later writers.
Acusilas says that the first man (after the cataclysm) was Phoroneus. Plato may have built the story of Atlantis around this fragment or the larger narrative from which it has survived. Never mind people: the first of all things, says Acusilas, was Chaos. Love came into the world a little later.
Speaking of love, Acusilas gives an interesting variant on one of Greek myth’s big romances. Aphrodite fell for a mortal, Anchises, and gave birth to Aeneas. That’s what they want you to think, anyhow: the sinister truth is that Aphrodite had a prophecy that Anchises’ descendents would take over Troy after the death of Priam. Romancing Anchises (already an old man, says Acusilas) was just her way of getting into the game. That done, she spurred Paris to kidnap Helen and then prevented thr Trojans from giving her back when they still might have saved their city. Troy fell, Priam died, and (as Acusilas could not possibly have known) the Romans, descended from Aphrodite via Aeneas, took over the Troad. Love plays the long game.
There were three Kabeiroi, Acusilas says, with their wives the Kabeirides. Argus Panoptes was earth-born. Actaeon had to die because he disputed with Zeus over Semele, not because he saw Artemis bathing.
Caine, turned Caineus by Poseidon and given rule over the Lapiths, died fighting the centaurs. Zeus spurred the centaurs to kill him for reasons that have fallen into a lacuna.
Conventional wisdom about Endymion is that Selene, the moon, asked Zeus to make him sleep all the time and in this way keep him young forever. Acusilas says that Zeus granted Endymion a different boon, which was that he could choose the time of his own death. This, one supposes, would have put Selene in a much more difficult position. Watching over a sleeping boy is easy; making sure that a boy wants to stay alive forever is a full-time job.