Salam everyone
On the Day of Judgement, aside from heaven and hell, do you think there would be a 3rd place for people who never got the message of monotheism? Also what happens to people who die as children or infants? Generally they would go to heaven, but these children never had the opportunity to knowingly perform either good or bad deeds. If they had grown up, they could have been evil tyrants or prophets. They will never be able to earn the highest level of heaven because they never had the opportunity. How will these people be judged?
Also some people live a lot longer than others, so they had the opportunity to perform more good deeds, so they might end up in higher levels of Jannah than someone who didn't live as long. How is this fair?
I've heard the theory that such people will be tested on the Day of Judgement and their place in heaven or hell will be determined then.
If you take two people--one who has heard the message and one who hasn't--and compare their good deeds, the believer will have more good deeds. However the person who never got the message never got the opportunity to hear about God and do better deeds.