Allah says in the Qur'an:
16:36 And verily, We have raised in every nation a Messenger, saying, "Serve Allah alone and shun false gods in any form." Then Allah guided some of the people (since they adopted the right approach (4:88)). And error took hold of others (who fell into arrogance or blind following (18:29)). Do take lessons from history as you travel in the earth, and see the consequence of the deniers.
This verse comes with an invitation to go around the world and investigate the fate/results of those who went astray. Question:
1. We know the blessed Messenger Muhammad is the Final Nabi
2. Is he then, the final Rasool as well? What is the difference between a Nabi and Rasool
3. Can we find evidence of Messengers in every nation around the world including South America, China, Japan, Africa, etc?
4. OR, this verse is addressed to an audience of 1400 years ago and "All nations" only meant the ones known to the Arabs (in Arabia and surrounding countries)?