12/30/2011

Ernest Shackleton set off for the South Pole in 1914. His mission failed, and he ignored advice that could have prevented or mitigated two years of isolation and danger, though he did bring his 22-man crew home alive. Historian Nancy F. Koehn says Shackleton's actions and demeanor are worth studying today, but fellow historian Edward Tenner wonders whether there's anything modern leaders can or should emulate.

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