"Branding is the profound manifestation of the human spirit," says designer and podcaster Debbie Millman. In a historical odyssey that she illustrated herself, Millman traces the evolution of branding, from cave paintings to flags to beer labels and beyond. She explores the power of symbols to unite people, beginning with prehistoric communities who used them to represent beliefs and identify affiliations to modern companies that adopt logos and trademarks to market their products -- and explains how branding reflects the state of humanity.