Halacha:

Lifnei Iver 

Description

Methodology of Psak Halacha (Yeshivat Har Etzion): This shiur explores how Rabbi Shlomo Zalman Aurbach and Rabbi Moshe Feinstein deal with varying cases of Lifnei Iver with non-religious Jews, including inviting them for Shabbos and giving them food on which they won't make a bracha. It highlights the sociological changes that they build on, including the existence of other denominations as well as the Conservative Movement's attempts to reinvigorate Shabbos observance by allowing driving on Shabbos.