Theopompos of Chios

Theopompus of Chios was a Hellenic scholar, historian and rhetorician. Born about
378 BC on the island of Chios.

He spent a part of his youth in Athens, where he emigrated with his father Damasistratos, after he was banished from Chios because of his sympathy for Sparta.

In the Athenian exile Theopompus was a pupil of Isocrates, where he successfully studied rhetoric (the art of persuasion through linguistic means) and apparently became a gifted orator.
By 335 BC, after the accession of Alexander the Great, Theopompus was able to return to Chios, where he worked as a political leader of the aristocratic party, but after the death of the ruler he was banished again and went to Egypt into exile.

Theopompus was a much-traveled man who not only dominated the rhetoric, but who had also a big interest in history and wrote literally hundreds of  historical writings, including major works, as the twelve-volume 'Hellenica' (Greek history) and the 'Philippica' (History of King Philip), which he finished in 324 BC, and which consisted solely of 58 books.
Although his publications are all gone lost in its original form, altogether 370 fragments of it remained - including 19 fragments of the 'Hellenica' – which are much quoted by later writers indicating its importance in the Hellenic spirit world. Yet his work was by no means uncontroversial.

According to the Encyclopedia Britannica, criticism of Theopompus' work was already practiced in ancient times, because of his allegedly "excessive fondness for romantic and implausible stories, some of which were later compiled and published under his name."
At the same time in antiquity he was “attacked because of his critical nature […] All in all he seemed to have in any case been pretty impartial."

His objectivity as a historian and courage to the truth, is also proven by the fact that he blamed the monarch for immorality and denounced his abuse of alcohol
in the 'Philippica'. Which he wrote in Macedonia – in range of the monarchs.

He died  about 320 BC (the exact year of death is unknown).