negrification (n.)

"fact or act of making Negro; a placing under control of blacks," 1929, in social context, from Negro on model of pacification, etc. Related: Negrify; negrified (1855). Johnson (1755) has nigrification in a literal sense "act of making black," and nigrify "blacken" is from 1650s.  Negrofy "to turn into a Negro" is from 1790.