Yissachar Shlomo Teichtal wrote the book Eim HaBanim Semeicha, which argues in favor of rebuilding Israel; this work helped mark him as one of Europe's few rabbis that disagreed with Ashkenazi Orthodox Judaism.
Yisachar Shlomo Teichtal The physical product of that introspection is the book, Eim HaBanim Semeicha, in which he specifically retracts his previous viewpoints, and argues that the true redemption can only come if the Jewish people unite and rebuild the land of Israel. Yissachar Shlomo Teichtal (1885-1945) was one of the few European rabbis to break ranks with Ashkenazi Orthodox Judaism to support an active effort to settle the land of Israel. 
