Kalischer was born in Lissa in the Prussian Province of Posen. Destined for the rabbinate, he received his Talmudic education from Jacob of Lissa and Rabbi Akiva Eiger of Posen. After his marriage he left Jacob of Lissa and settled in Thorn, a city on the Vistula River, then in Prussia and now Toruń, in northern Poland, where he spent the rest of his life. In Toruń, he took an active interest in the affairs of the Jewish community, and for more than forty years held the office of Rabbinatsverweser. Disinterestedness was a prominent feature of his character; he refused to accept any remuneration for his services. His wife, by means of a small business, provided their meager subsistence. The name Zvi Hirsh is a bilingual tautological name in Yiddish. It means literally "deer-deer" and is traceable back to the Hebrew word צבי tsvi "deer" and the German word Hirsch "deer"..
Works
In his youth he wrote Eben Bochan, a commentary on several juridical themes of the Shulkhan Arukh, Choshen Mishpat, and Sefer Moznayim la-Mishpat, a commentary, in three parts on the whole Choshen Mishpat. He also wrote: Tzvi L'Tzadik glosses on the Shulkhan Arukh, Yoreh De'ah, published in the new Vilna edition of that work; the Sefer ha-Berit commentary on the Pentateuch; the Sefer Yetzi'at Mitzrayim commentary on the PassoverPesach Haggadah; Chiddushim on several Talmudical treatises; etc. He also contributed largely to Hebrew magazines, as Ha-Maggid, Tziyyon, Ha-'Ibri, and Ha-Lebanon.
Views on the re-settlement of the Land of Israel
Inclined to philosophical speculation, Kalischer studied the systems of medieval and modern Jewish and Christian philosophers, one result being his Sefer Emunah Yesharah, an inquiry into Jewish philosophy and theology ; an appendix to volume 1 contains a commentary on Job and Ecclesiastes. In the midst of his many activities, however, his thoughts centered on one idea: the settlement of the Land of Israel by Jews, in order to provide a home for the homelessEastern European Jews and transform the many Jewish beggars in the Holy Land into a population able to support itself by agriculture. He wrote in the Ha-Levanon, a Hebrew monthly magazine. In 1862 he published his book Derishat Tzion on this subject, including many quotes from his commentaries in the Ha-Levanon magazine. He proposed:
To collect money for this purpose from Jews in all countries
To buy and cultivate land in Israel
To found an agricultural school, either in Israel itself or in France, and
To form a Jewish military guard for the security of the colonies.
He thought the time especially favorable for the carrying out of this idea, as the sympathy of men like Isaac Moïse Crémieux, Moses Montefiore, Edmond James de Rothschild, and Albert Cohn rendered the Jews politically influential. To these and similar Zionist ideals he gave expression in his Derishat Zion, containing three theses:
The salvation of the Jews, promised by the Prophets, can come about only in a natural way — by self-help
The appendix contains an invitation to the reader to become a member of the colonization societies of Israel. The second part of the book is devoted to speaking to "the nations" who believe inthe Bible and the prophets, and persuading them, that this new course in history is a logical one, and that they too can hope for the salvation of the Jewish nation as part of the salvation of the entire world. This book made a very great impression, especially in Eastern Europe. It was translated into German by Poper, and a second Hebrew edition was issued by N. Friedland. Kalischer himself traveled with indefatigable zeal to various German cities for the purpose of establishing colonization societies. It was his influence that caused Chayyim Lurie, in Frankfort-on-the-Main in 1860, to form the first society of this kind, and this was followed by others. Owing to Kalischer's agitation, the Alliance Israélite Universelle founded the Mikveh Israel agricultural school in Palestine in 1870. He was offered the rabbinate, but he was too old to accept it. Although all these endeavors were not attended with immediate success, Kalischer never lost hope. By exerting a strong influence upon his contemporaries, including such prominent men as Heinrich Grätz, Moses Hess, and others, he is considered to have been one of the most important of those who prepared the way for the foundation of modern Zionism.