Penn State provides funding as a founding partner of The Conversation US ... a map proposing to divide up police districts within San Francisco, largely along racial lines. The Black Panthers ...

We see how 8 Mile Road serves as the dividing line between two largely homogenous swaths--one predominantly white and one predominantly black. But the map doesn't just tell us about distinct cities.

Under the "one-drop rule" in the 19th and early 20th century, a single drop of African-American "blood" made a person black, even if their heritage was overwhelmingly white. Similarly, on ...