<div>Regarding the history, I'll pass for now. </div>
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<div>But regarding the Ramban, it is very important to distinguish between his Lashon regarding when the Mitzvah of Kibbush applies, and when the Mitzvah of Dirah on each Yachid applies (this distinction is clear LaMeayain Heitev); and the idea that it only applies to those already in EY is not the Vayoe"M's own, the Avnei Nezer raises such a possibility in the Ramban.
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