The Georgia Negro: A Social Study - Diagram shows routes of the African slave trade with state of Georgia starred [LCCN2013650420]
The pattern
This still is filed under Data as proof.
Define
A chart, map, or count that is the argument, not an illustration next to the argument.
Mechanism
Sighted evidence. The reader is asked to believe their eyes: a bar, a share, a spread on a map.
Verdict
The claim is comparative or quantitative and the figure can be read without a caption doing the sell.
Why it works
The plate works by zoom: world, then diaspora, then one state, then a single sentence that names the stake. Du Bois puts the argument's scope in the picture before any statistic appears, so every later chart is read as evidence for a claim already framed rather than as loose data. Setting Africa in solid black against ochre makes the continent the visual origin point and the arcs make the displacement an act done to people, not a demographic fact. The closing quote is positioned as a caption, not a headline, which lets it land as a conclusion the reader reaches rather than a slogan they are handed.
Steal this when
Use this structure for the opening page of any evidence deck where the audience does not yet accept that the subject matters. Establish scope, method and thesis on one surface, then spend the rest of the piece only on proof.