Yitzhak Gruenbaum was born in Warsaw, Poland. While a student of jurisprudence, he began activities on behalf of the Zionist movement and engaged in journalism. He served as editor of several periodicals widely circulated among Polish Jewry, including the HebrewHa-Zefirah and the Hebrew weekly Ha-Olam. Under his editorship, the Yiddish daily, Haynt, took on a pro-Zionist slant. In Poland, Gruenbaum headed the Radical Zionist faction, initially known in Poland as Al Hamishmar. In 1919 he was elected to the Sejm, where, together with Apolinary Hartglas, he organized a "Jewish bloc" that united most of the Jewish parties. He was the moving force in forming a collaboration with other minority parties represented in the Sejm, including Germans, Ukrainians, and others, to form a Bloc of National Minorities alliance in 1922, that acted to represent the rights of minority populations in Poland. His efforts brought about an increase of Jewish representation in the Sejm, which was accompanied by a rise of the political Zionism. Gruenbaum was known for his courageous and militant stance against his opponents and on behalf of minorities' interests, while equally critical of the ultra-orthodox party Agudat Israel and Jewish lobbying. After moving to Paris in 1932, Gruenbaum immigrated to Mandatory Palestine in 1933 after being elected to the Jewish Agency Executive, during the Eighteenth Congress of the Zionist Organization.
Zionist activism
During the Holocaust, he served on the "Committee of Four" chosen at the outbreak of World War II to maintain contact with Polish Jewry and aid in their rescue. In 1942, when word reached the Yishuv of the mass extermination by the German occupying forces taking place in Eastern Europe, Gruenbaum was chosen to head a 12-member Rescue Committee comprising representatives of the various parties. Due to circumstances prevailing at the time, their rescue efforts failed to accomplish much. At the war's end, he endured a personal crisis involving his son, Eliezer Gruenbaum. The latter, a Holocaust survivor, was accused in Paris by two other Holocaust survivors of having served as a Kapo and acting with cruelty towards Jewish prisoners. During his son's detention and trial, Gruenbaum remained at his side. When the case closed, Eliezer immigrated to Palestine but continued to be attacked by right-wing and religious groups eager to discredit his father. Not long afterwards, Eliezer was killed in the 1948 Arab-Israeli War. leaders, arrested in Operation Agatha, in detention in Latrun : David Remez, Moshe Sharett, Yitzhak Gruenbaum, Dov Yosef, Mr. Shenkarsky, David Hacohen, and Isser Harel In 1946, Gruenbaum was among the Jewish Agency directors arrested by the British and interned in a detention camp at Latrun. He spent his later years on KibbutzGan Shmuel, and died in 1970.
He served as editor of the Hebrew Ha-Zefirah, the Hebrew weekly Ha-Olam and the Yiddish daily, Haynt. Gruenbaum was the editor of the Encyclopedia of Diaspora Communities, The Zionist Movement and its Development and many other books.
One cow in Palestine is worth more than all the Jews in Europe. I think it is necessary to state here – Zionism is above everything. I will not demand that the Jewish Agency allocate a sum of 300,000 or 100,000 pounds sterling to help European Jewry. And I think that whoever demands such things is performing an anti-Zionist act.
