Well without the bible Christianly from my point of view would be exactly the same as it is today. The Bible was written over a period of 1400 to 1800 years therefore the message of our lord spread not by text but by oral. And without the bible all Christians around the world would still have the same knowledge about God, this would be possible through all his disciples, apostles and saints
I do not agree with James although i do understand were he is coming from. The word of God would not have spread all over the world without the bible being written. The bible plays a very important role in the peoples knowledge about God.