Excellent article, thank you. I learned quite a bit, not least the fact that Whitaker Chambers was actually a very good writer (I only knew of him, and thought he was a mouth-breathing McCarthey-ite; had no idea he was a senior writer for Time Magazine in the 50s). A small criticism: Chambers called 'Atlas' "a massive tract for the times," and you borrow this idea ("an XXL-sized political pamphlet") without attribution. Chambers also makes the point that Aristotle was the only philosophical influence Rand was willing to acknowledge later in her life, though this might have been common knowledge, more or less, when Chambers mentioned it, so perhaps attribution isn't necessary in that case. Also, when you quote the letter Greenspan wrote to the NYTimes in 1957 in defense of Rand, you don't mention that it was the Times reporter Harriet Rubin, 50 years later, who uncovered that nugget and put it in a 2007 story, "Ayn Rand’s Literature of Capitalism" (though you do link to the NYT story, which is better than nothing).