Amidst unfettered mobility, Jewish leaders like Isaac Mayer Wise and Isaac Leeser attempted not only an institutional overhaul of American Judaism, but also an ideological one. Jewish leaders engaged in popular geography and new forms of theological reflection, drawing on Jewish thought and the ideologies of American imperialism. They both critiqued the settings of American Jewish life, even advocating for agricultural colonies, but also developed a Jewish pastoral ideal. In this mode, they developed novel understandings of Jewish identity, Jewish institutions, and religious change. The internalized “Jewish heart” and the powerful “empire of our religion” both became widespread metaphors for explaining how and why Judaism would flourish anywhere. They were used by a broad swath of Jewish leaders, as was the concept of “progress,” although those allied with Wise’s Reform Judaism and with Leeser’s traditionalism soon developed competing understandings of how religious change should happen and of whether Judaism should be fully mobile or merely portable. In spite of these divides, they helped establish an underlying confidence that Judaism could and should prevail throughout the American continent through institutional development and individual identities.