God says that he is a merciful God. To answer your question I would say "NO". God knows there are people out there who haven't heard of him. God sees every human's heart and mind and knows what kind of person they are. God reserves judgment unto himself. But another question is--what is hell? The Greek word Hades referrs to a hole in the ground where all man goes when he dies. The burning hell you are referring to is the Lake of Fire where those who have received God's judgment go. All mankind have to stand before God Almighty when it's their time. God opens the book of life and the rewards He has written in there are given to the people whose names are written in His book.