Not to discourage other answers, but you may want to look at our Monday Methods posts.
As one of the non-professional historians who posts here I've found some of their discussions on historiographical developments (i.e. changes in the study of history, precisely your question) to be extremely useful. A very large portion of them will be pertinent to your question, but as a start you might want to look at these ones, as I've found them to be helpful:
https://www.reddit.com/r/AskHistorians/comments/5e9s91/monday_methods_marxism_and_hegemony/
https://www.reddit.com/r/AskHistorians/comments/4wq5s4/monday_methods_wallerstein_world_system_and/