New answers tagged rishonim
The shift happened from the Shulchan aruch. Before the Shulchan Aruch, halacha was decided by each posek looking towards the Talmud and Geonim, or being influenced by other Rabeim, and coming to their own decision about an issue, based on what made sense to them and their community. (Using many many factors) The Shulchan Aruch however, decided to take a 2 ...
The time of the shulchan aruch is about right; there is also a shift in rabbinical names about the same time. many(but not all) rishonim went by acronyms...rashi, rashbam, rambam, ramban, or by their own names .... ibn ezra,sforno, abarbanel acharonim often wrote their comments under a pen name....chafetz chaim, gur aryeh, etc.
I was a bit confused by your question because 'shitah' is usually a term used in learning halakhah but Derekh Hashem isn't a book of halakhah, i.e., what to do, but rather a presentation of a conceptual framework for understanding religion and the world. As far as the sources of the ideas: they come in large part out the Ramhal's engagement with the writings ...
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