This post appeared on X. The following was sourced using Gemini LLM: The 1900 pamphlet Or la-Yesharim (meaning “Light for the Upright” or “Light for the Righteous”) is a foundational text in modern Jewish history. Published in Warsaw by Rabbis Shlomo Zalman Landa and Yosef Rabinowitz, it was the first major, unified rabbinic manifesto explicitly …