Nathaniel Dance-Holland · Public domain
James Cook
A grocer's apprentice who learned the sea on North Sea coal ships, Cook rose through the Royal Navy's sailing-master ranks to command three Pacific voyages between 1768 and 1779, charting New Zealand and Australia's east coast, crossing the Antarctic Circle, and proving the marine chronometer at sea. His charts stayed in use for over a century.
Cook fought scurvy with management as much as medicine. Aboard Endeavour he ordered sauerkraut — which sailors detested — served daily at the officers' table while leaving it merely available to the crew, noting in his journal that whatever the men saw their superiors value, they would soon demand. Within a week the crew asked for rations. On his second voyage, three years and over 100,000 kilometers, he did not lose a single man to scurvy — an unheard-of feat in the 18th century.
“Crews copy what command visibly values; Cook managed his people with the same rigor as his charts.”