To describe her as a minor figure in the history of philosophical thinking about knowledge and reality would be a wild overstatement. She’s irrelevant…She doesn’t understand the historical positions of thinkers on these issues, such as Hume and Kant. Even the minority of philosophers with some sympathy for her celebration of the virtues of selfishness usually find her general philosophical system embarrassing.

—Brian Leiter, Director of the Center for Law, Philosophy and Human Values at the University of Chicago