Great Historical Migrations = Barbarism

Human history has witnessed the epoch of great migrations on the basis of barbarism. Socialism will open the possibility of great migrations on the basis of the most developed technique and culture. It goes without saying that what is here involved is not compulsory displacements, that is, the creation of new ghettos for certain nationalities, but displacements freely consented to, or rather demanded by certain nationalities or parts of nationalities. The dispersed Jews who would want to be reassembled in the same community will find a sufficiently extensive and rich spot under the sun. The same possibility will be opened for the Arabs, as for all other scattered nations. National topography will become a part of the planned economy 

http://www.marxists.org/archive/trotsky/1940/xx/jewish.htm

Trotsky