Conversation so far:
Who did Jane Jacobs write for?
Jane Jacobs became a feature writer for the Office of War Information, and then a reporter for Amerika, a publication of the U.S. State Department.
What happened after the Harvard lecture for Jane Jacobs?
After reading her Harvard speech, William H. Whyte invited Jane Jacobs to write an article for Fortune magazine.

Question: What is this?
Self-contained rewrite: What is the Harvard lecture for Jane Jacobs?