2013 was a good year for prognostications about the American Jewish future. The Pew Research Center released findings of a national survey of Jews, and the data were rich enough to spark intense wrangling over their implications. For those trying to make sense of the current debates, or for those who think about the future by first considering the past, the Berman Jewish Policy Archive presents this guide to demographic debates of yore. In the pages that follow, readers will find discussions of method and interpretation dating back to the first half of the 20th century, but with a special focus on the three major National Jewish Population Surveys of 1970, 1990 and 2000-1.