Just north of 125th Street, the Schomburg Center for Research in Black Culture displays a timeline of black political activism. The familiar faces— Garvey, DuBois, King, Malcolm X, Jackson— are all there. So is a picture of a group of black protesters, men and women, in long coats, fedoras and pillbox hats picketing against discriminatory hiring practices by defense contractors … in 1943. One man is holding a sign that reads, “The Negro People Must Have Jobs.”The popular history of the black civil rights movement usually focuses on its quest for legal rights like the ability to attend previously all-white schools, sit at the front of the bus or eat at Jim Crow lunch counters. But bread-and-butter issues were always at the movement’s core, because black-white disparities in the job market have been present almost since what Hilary Shelton, director for the NAACP’s Washington bureau, calls “that very peculiar employment program, the African slave trade.”It wasn’t until the middle part of last century, however, that those disparities began showing up in the unemployment rate.