The specific terms "self-hating Jew" and "Jewish self-hatred" only came into use later, developing from Theodor Herzl's polemical use of the term "anti-Semite of Jewish origin", in the context of his project of political Zionism. The underlying concept gained common currency in this context, "since Zionism was an important part of the vigorous debates that were occurring amongst Jews at the time about anti-Semitism, assimilation and Jewish identity." Herzl appears to have introduced the phrase "anti-Semite of Jewish origin" in his 1896 book, "Der Judenstaat" (The Jews' State), which launched political Zionism.