Thanksgiving and philanthropy go hand in hand. No one felt this more strongly than Andrew Carnegie, who in his day set a new American course for philanthropy that continues to inspire today. As people everywhere give thanks and launch this year's holiday season, here's a look at some private papers of Mr. Carnegie, whose birthday -- November 25, 1835 -- we celebrate this weekend... unique reminders of the importance of giving back.
View slide show at The Huffington Post.