A dramatic oversimplification, at least as applies to the west. Today western historiographers are virtually obsessed with portraying perspectives of the 'opressed', the 'marginalized', the 'losers' in history often to the detriment of actual historical truth. And further back than that think about all the early historians of imperial Rome who were nostalgists for the Republic. I don't know enough about Eastern historiography to even begin to make a judgement about it. Personally my favorite Churchill /his/tory quote has to be:
"Only history can judge me, but I will be one of the historians."