The earliest known Asian diaspora of note is the Jewish diaspora. With roots in the Babylonian Captivity and later migration under Hellenism, the majority of the diaspora can be attributed to the Roman conquest, expulsion, and enslavement of the Jewish population of Judea, whose descendants became the Ashkenazim, Sephardim, and Mizrahim of today, roughly numbering 15 million of which 8 million still live in the diaspora, though the number was much higher before Zionist immigration to what is now Israel and the murder of 6 million Jews in the Holocaust.