Dr Tim Crowley spoke on the topic of freedom of thought and speech at the Iona Institute annual youth conference. Dr Crowley in particular drew on lessons from ancient Greece, including the trial of Socrates (pictured) for defying the mores of his day, and how these lessons apply to our present situation.
Dr Crowley is a lecturer in philosophy at University College Dublin. He obtained his DPhil at the University of Oxford and he is a prominent defender of freedom of speech.
You can listed to his talk here. [1]