Why God Doesn't Speak With Everyone On Individual Basis?
Brother if u can clarify your question regarding prophets and non believers than it’ll help, it’s not clear what exactly is you r asking Criteria for prophethood is not shared by Allah in Quran or Hadith or any other book. it was His sole decision to grant prophethood. Prophet knew he is the prophet right away meaning it’s not a gradual ascent to prophethood. There’s no “evolution “ into becoming a prophet, it was Be and It is