Conversation so far:
What did Nate create ?
On November 1, 2007, while still employed by Baseball Prospectus, Silver began publishing a diary under the pseudonym "Poblano" on the progressive political blog Daily Kos.
What was in the diary ?
Silver set out to analyze quantitative aspects of the political game to enlighten a broader audience.

Question: What was the motivation ?
Self-contained rewrite: What was the motivation behind Nate Silver's decision to publish the diary?