Rabbi Dr. Adam Mintz is a Modern Orthodox rabbi in Manhattan and a popular lecturer on Jewish history. He has posted on his website his recently completed doctoral dissertation (NYU) — Halakhah In America: The History Of City Eruvin, 1894-1962: link
Description: This dissertation will address the evolution of the community eruv from the days of the courtyards of Roman Palestine to the cities of North America. It will explore and analyze the halakhic arguments that enabled the rabbis to adapt a rabbinic concept that originally had limited application into a broad practice that allowed tens of thousands of Jews throughout the centuries to carry on the Sabbath. How did these rabbis, through their adaptation of the original rabbinic sources and their creative ingenuity, apply the traditional sources to the new geographic realia that they found in each city?
See prior posts here: link