A- Tutored Alexander the Great --- ARISTOTLE
In 343 BC, King Philip II of Macedonia summoned Aristotle to be the guardian of his 13-year-old son, who would later be known as Alexander the Great. Aristotle then traveled to Pella, then the capital of the Macedonian empire, and taught to Alexander for at least two years, until he began his military career.
B- Condemned to death by poison --- SOCRATES
Although during the first part of his life he was a patriot and a man of deep religious convictions, Socrates nevertheless suffered the distrust of many of his contemporaries, who disliked the new position he took against the Athenian state and established religion, mainly against the metaphysical beliefs of Socrates, who posed "an ethereal existence without the consent of any god as an explicit figure." He was accused in 399 BC of introducing new gods and corrupting the morals of youth, away from the principles of democracy. On the contrary, Socrates declared himself a devotee of the gods, and did not intend to introduce new deities.
Hemlock poisoning was a method commonly used by Greeks to execute death penalty sentences. Socrates was tried and, convicted, served this sentence in 399 BC.
He died at 70 years of age, serenely accepting this condemnation, a method chosen by a court that judged him for not recognizing the Athenian gods and corrupting the youth.
C- Thought philosopher-kings should run the government --- PLATO
Plato said: "Until the philosophers govern as kings or, those who are now called kings and leaders, can philosophize properly, that is, until both political and philosophical power agree, while the different natures seek only one single of these powers exclusively, the cities will not have peace, nor will the human race in general".