Do you believe Church tradition or what the Bible actually says?

Do you believe that Moses wrote the first five books of the Bible? Or do you accept the evidence to the contrary from the Bible itself? Genesis 36:31 refers to Israelite kings reigning, and thus reflects a knowledge of the monarchy. Deuteronomy 34, like the rest of the Bible, not only speaks about Moses in the third person, but also talks about his death as an event in the distant past ("never since..."). Do you accept the evidence from the Bible itself, or do you impose later traditions about authorship on the text, and why?