The 'only one history' view cannot be relied on in a discussion that may cross education systems (e.g. the internet). I was taught, quite clearly, that history was the things and actual events, not someone's interpretation or a narrative put together at a later time from a particular perspective.

However, in some places it is taught that 'history' is the historian's narrative, not the actual events. So you can have "A history of ..." - note the indenfinite article.

In either case what we read cannot be relied on as a correct account of past events.