It is interesting that you label history (that is: the inquiry of the historian) to be a science. Surely, while even science struggles with proving 'facts', history is more akin to literature and philosophy and consciously so. I see history more as an art that uses sciences (anything from psychology to statistics) as tools to better know the human condition. Have you read Nietzsche's "On the uses and abuses of history for life"? I think you would find it most stimulating.