This isn't unique to blacks. Of all the populations of the entire planet only Whites are productive. We are a peculiar people on the entire planet.
What Happened to Brussels? The Big Decline and Muslim Immigration
https://youtu.be/RhQcHIQGsJQ
EDIT: Also interesting, another thread from that video
Joe Henrich on how Westerners became psychologically peculiar and economically prosperous
https://youtu.be/I6e_5x4LQz8