Callisthenes ( 327 BC)

Historian from Olynthos who was a young relative of Aristotle. Alexander the Great invited Callisthenes to come with him on his expeditions in the East as his official historian, which he gladly accepted. As the king conquered new grounds, Callisthenes wrote his praise, and compared him to Zeus and Achilles.

Alexanders success made him rather bigheaded, and when he wanted his subjects to fall on their hands and knees for him (proskyne) Callisthenes opposed. He was then accused of taking part in a conspiracy against the king, and was executed in 327 BC as a traitor.

As a result, Theophrastus and the Peripatetic school became hostile towards Alexander, and they described him as a merciless tyrant.

Not much of Callisthenes work has survived, but his book "The conquests of Alexander" has.