At the height of the 1960s civil rights movement, when "an overwhelmingly white art world ... tended to regard blacks as a social abstraction" (in the typically sharp words of critic Robert Hughes), Romare Bearden helped open eyes and minds with works of striking communication, beauty and power. More than 75 examples of Bearden's works on paper can be savored in an engrossing exhibit at the Reginald F. Lewis Museum of Maryland African American History and Culture.