In 1996 Gordon and Horowitz published a study entitled Will your grandchildren be Jewish? Their conclusion: if one were to view the Jewish Nation as a totality, based on ever decreasing birth rates and skyrocketing intermarriage rates, the odds of any Jews being left by the end of the 21 st century are slim to none.
However, one category stands out in stark relief — the Orthodox. Based on their average birth rate of between 4-6 children per family, and their intermarriage rate of less than 3%, they are burgeoning and ever increasing. We should expect that by the end of this century the Jewish Nation will be alive and vibrant, however strictly Orthodox. The only question that remains is of those Jews alive today: How many will make it themselves, and how many of their grandchildren will be Jewish.