Sarna argues that Canadian and United States Jewish historians should also begin to learn from one another. He offers a list of ten subjects which lend themselves to comparative analysis. He states that we should be interested in analyzing the unique and common features in the Jewish experience of our respective countries. We should be determining both what shaped the Jewish communities on either side of our common border, and why they differed. We should be broadening our horizons, asking new questions, and answering old questions based on fresh comparative data.