Salaam Alaikum!
When I think about coercion, the first individual that surfaces to mind is Aristotle. Anyhow, "let there be no compulsion in religion" is an imperative injunction that is evident within the Quran itself. However, let it be known, that Medieval jurists had their wits about 'coercion' and "freedom of choice.”
To rephrase Ayn Rand’s statement about coercion, “Where coercion begins, the death of the mind begins.”
–Ibn