In 1898, Baker joined the staff of McClure’s, a pioneer muckraking magazine, and quickly rose to prominence along with Lincoln Steffens and Ida Tarbell. He also dabbled in fiction, writing children’s stories for the magazine Youth’s Companion and a nine-volume series of stories about rural living in America, the first of which was titled “Adventures in Contentment” under the pseudonym David Grayson.

In 1906, Baker, Steffens and Tarbell left McClure’s and created The American Magazine. In 1908, he wrote the book Following the Color Line, becoming the first prominent journalist to examine America’s racial divide. It was extremely successful. He would continue that work with numerous articles in the following decade.

In 1912, Baker supported the presidential candidacy of Woodrow Wilson, which led to a close relationship between the two men, and in 1918 Wilson sent Baker to Europe to study the war situation. During peace negotiations, Baker served as Wilson’s press secretary at Versailles. He eventually published 15 volumes about Wilson and internationalism, including an 8-volume biography, the last two volumes of which won the Pulitzer Prize for biography in 1940.

Baker wrote two autobiographies, Native American (1941) and American Chronicle (1945).

1. I sometimes think we expect too much of Christmas Day. We try to crowd into it the long arrears of kindliness and humanity of the whole year. As for me, I like to take my Christmas a little at a time, all through the year. And thus I drift along into the holidays–let them overtake me unexpectedly–waking up some fine morning and suddenly saying to myself: Why this is Christmas Day!

2. Adventure is not outside man; it is within.

3. Life is too brief. I had a friend whom I intended to know better. Yesterday he died.

4. A large volume of adventures may be grasped within this little span of life, by him who interests his heart in everything.