At pre-1965 immigration rates, ethnic communities had steady growth rates and were not necessarily dominated by recent immigrants, meaning that the community as a whole had greater incentive to assimilate; however, at today’s immigration rates, ethnic communities continue to be primarily composed of first and second generation immigrants, who may well maintain stronger cultural ties to their countries of origin than previous groups of immigrants (Alba & Nee 1997).
It's going to be a long week.