Approximately 10.5 percent of North Korea's population including migrant workers and human trafficking victims are categorized as modern slaves according to data by the Walk Free Foundation.

According to Walk Free's Global Slavery Index, nearly 36 million people are living in modern slavery across the globe - that's 0.5 percent of the world's population.

This infographic, produced for IndustryWeek by Marketo Marketing Automation Tools and BlueGlass Interactive, walks through the evolution of modern marketing from its simple roots to its complex ...