"The failure of the Russian Revolution of 1905 and the wave of pogroms and repressions that followed caused growing numbers of Russian Jewish youth to immigrate to Palestine as pioneer settlers. By 1914 there were about 90,000 Jews in Palestine; 13,000 settlers lived in 43 Jewish agricultural settlements (kibbutzim), many of them supported by the French Jewish philanthropist Baron Edmond de Rothschild. Many of the settlers in this period were Labor Zionists, a particular strand of Zionism that promoted collective enterprises (such as the kibbutzim) as a means to build a Jewish state and eventually constituted the bulk of the Israeli left." - britannica