Hirsch Bär Fassel

His book Mozene Zedek, a manual for rabbis on Talmudic decisions on practical matters, urged other rabbis to be lenient in making rulings against individuals in non-criminal matters.

Fassel believed that reforms in Judaism were legitimate, so long as they were brought about by rabbis.

In addition to Mozene Zedek, he wrote and published at least a dozen other books.

His manuscript of Mozene Zedek is on display at the Hebrew Union College.

His daughter Rosa Sonneschein was the founder of the American Jewess.