ethnologist

noun

1. One who practices ethnology.

   “The learned modern Ethnologists, however, will generally have none of this latter idea. As a rule they delight in representing early peoples as totally destitute of common sense (which is supposed to be a monopoly of us moderns!); and if the Sabbath-arrangement has had any value or use they insist on ascribing this to pure accident, and not to the application of any sane argument or reason.”