It seems that one can associate the beginnings of the massive migration of the Jews to the United States with two events, contemporary with it: (1) the setback of Theodore Herzl (who died in 1904) in his attempt to found a Jewish state in Palestine, which was especially of concern to the Russian and Polish Jews who were victims of periodic pogroms, and (2) the first steps taken by the United States to establish immigration quotas (1917-1924) which, according to the figures cited above, make it clear that the immigration of the Jews was largely clandestine after 1917.
Sembra dunque possibile l'associare gli inizi della migrazione di massa ebrea verso gli Stati Uniti a due avvenimenti che le sono contemporanei. Uno: lo scacco di Teodoro Herzl (morto nel 1904) nel suo tentativo di fondare uno stato ebraico in Palestina, che era di grande interesse per gli ebrei russi e polacchi, vittime dei pogroms periodici.