Thomas J. Dorsey liberated himself from enslavement and became one of the most sought-after caterers in Philadelphia. His son William Henry Dorsey was born a free Black man before the Civil War, and became an artist, collector and scrapbooker.
Research:

Peter Kropotkin's Mutual Aid, Part 1
45:03

SYMHC Classics: Haymarket Riot
37:40

Behind the Scenes Minis: Serving Lip and Ethics
26:19