New and interesting research associates contemporary voting behaviour of blacks with a past of lynchings. Here is the abstract to the article by Jhacova Williams:

This paper analyzes the extent to which the political participation of Blacks can be traced to historical lynchings that took place from 1882 to 1930. Using county-level voter registration data, I show that Blacks who reside in southern counties that experienced a relatively higher number of historical lynchings have lower voter registration rates today. This relationship holds after accounting for a variety of historical and contemporary characteristics of counties. There exists evidence of the persistence of cultural voting norms among Blacks, yet this relationship does not exist for Whites.

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