“The Most Striking Circumstance”
The nineteenth century witnessed the development of a bitter struggle between monogenists and polygenists. Polygenists increasingly looked for confirmation of racial hierarchies and signs of racial immutability in physiological indicators. Change in color within a race seemed to be an unanswerable proof of the effect of nature on racial characteristics and seemed to offer an explanation of racial difference. The color change of Jews from white to black was the best example of this, and increasingly black Jewish communities became the proof monogenists needed of the unitary origins of humankind. James Cowles Prichard was the leading British monogenist, and he was among the first to perceive that the color spectrum in Jews was the strongest weapon in the monogenist armory.