Pulitzer Prize-winning biographer Jon Meacham on the evolution of Abraham Lincoln's moral principles and political leadership -- and what the era of Lincoln can teach us about the state of our democracy today.
Clarence King was a famed explorer, scientist, and hero of late nineteenth century history. But the blue-eyed and fair-skinned King also led a secret double life passing as a black man. A historian examines the secret King only revealed on his deathbed to his black wife of thirteen years.
- Martha Sandweiss Professor of history at Princeton University
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