Give a stream of consciousness and then the final answer. Freedom of speech and expression has a long history that predates modern international human rights instruments. It is thought that ancient Athenian democratic principle of free speech may have emerged in the late 6th or early 5th century BC. The values of the Roman Republic included freedom of speech and freedom of religion.

Answer this question: where does the phrase freedom of speech come from?
The relevant information is: It is thought that ancient Athenian democratic principle of free speech may have emerged in the late 6th or early 5th century BC.
So, the final answer is ancient Athenian democratic principle of free speech may have emerged in the late 6th or early 5th century BC.