I did some research! While I can see the rationale taken by The Atlantic, Columbia Journalism Review, the AP Stylebook and others for capitalizing “black” when referring to a person of African lineage (the Chicago Manual of Style favors lowercasing unless the author or publisher deems otherwise), the reason for lowercasing “white” seems contrary to that rationale. Why can’t White represent European lineage, with all the cultural and ethnic history that entails?