Crushed Jewish revolts against the Romans by Titus in 70 and Hadrian in 135 notably contributed to the numbers and geography of diaspora, as many Jews were scattered after losing their state Judea or were sold to slavery throughout the Roman empire.
Subsequent numerous exiles and persecution, as well as political and economic conditions and opportinuties, affected the numbers and dynamics of Jewish diaspora. In today's diaspora, the largest number of Jews (about 6 million) live in the US.