Joseph Burtt and William Cadbury -- Cocoa controversy -- Chocolate island -- Sleeping sickness and slavery -- Luanda and the coast -- The slave route -- Mozambican miners -- Cadbury, Burtt, and Portuguese Africa -- Cocoa and slavery

In the past two decades, markets grew to accommodate no less than 435 “eco-labels” or standards such as Organic, Fair Trade, Rainforest Alliance, and UTZ Certified, that claim some aspect of sustainability. They constitute multi-billion dollar markets and the world’s leading food and...