Joe Pinsker in The Atlantic:
One hundred years ago, “Colored” was the typical way of referring to Americans of African descent. Twenty years later, in the time of W.E.B. Du Bois, it was purposefully dropped to make way for “Negro.” By the late 1960s, that term was overtaken by “Black.” And then, at a press conference in a Hyatt hotel in Chicago in 1988, Jesse Jackson declared that “African American” was the term to embrace; that one was chosen because it echoed the labels of groups, such as “Italian Americans” and “Irish Americans,” that had already been freed of widespread discrimination.
A century’s worth of calculated name changes are a testament to the fact that naming any group is a politically freighted exercise. A 2001 study catalogued all the ways in which the term “Black” carried connotations that were more negative than those of “African American.” This is troubling on the level of an individual’s decision making, and these labels are also institutionalized: Only last month, the US Army finally stopped permitting use of the term “Negro” in its official documents, and the American Psychological Association currently says “African American” and “Black” can be used interchangeably in academic writing.