Free will in antiquity
In Plato's Gorgias (and in the Protagoras 345c4-e6), Socrates argues that no one does wrong willingly, one of the most famous doctrines to be associated with him. When framed in modern (Western) terms, the implication is that it is ignorance, rather that free individual agency, that is responsible for morally wrong actions.
Freedom of thought
It is impossible to know with certainty what another person is thinking, making suppression difficult. The concept is developed throughout the Bible, most fully in the writings of Paul of Tarsus (e.g., "For why should my freedom ["eleutheria"] be judged by another's conscience ["suneideseos"]?" 1 Corinthians 10:29).
Although Greek philosophers Plato and Socrates had discussed Freedom of Thought minimally, the edicts of King Ashoka (3rd century BC) have been called the first decree respecting Freedom of Conscience. In European tradition, aside from the decree of religious toleration by Constantine I at Milan in 313, the philosophers Themistius, Michel de Montaigne, Baruch Spinoza, John Locke, Voltaire, Alexandre Vinet, and John Stuart Mill and the theologians Roger Williams and Samuel Rutherford have been considered major proponents of the idea of Freedom of Conscience (or 'soul liberty' in the words of Roger Williams).