It is sometimes claimed that Ayn Rand introduced Murray Rothbard to Aristotle. While this assertion is common in some Objectivist circles, the historical evidence does not support it.
What Rothbard did explicitly credit Rand for was introducing him to the tradition of natural rights and natural law. In a 1958 letter after reading Atlas Shrugged, he wrote, “You introduced me to the whole field of natural rights and natural law philosophy.” This acknowledgment is well documented and reflects the profound impact Rand had on his early ethical thinking.
However, there is no comparable statement in which Rothbard credits Rand with introducing him to Aristotle. On the contrary, evidence suggests that Rothbard was already committed to Aristotelian philosophy before becoming closely associated with Rand. Historian D. J. Flynn uncovered a 1957 postcard in which Rothbard referred to Aristotelianism and natural rights as established features of his own intellectual outlook, predating his involvement with Rand’s inner circle.
Rothbard’s mature philosophical works reinforce this conclusion. In The Ethics of Liberty and other writings, he consistently cites Aristotle, Thomas Aquinas, and the broader Aristotelian-Thomist tradition as the foundations of his natural law philosophy, without attributing his Aristotelianism to Rand.
The most accurate conclusion, therefore, is that Ayn Rand played a significant role in Rothbard’s embrace of natural rights philosophy, but there is no convincing evidence that she was the one who first introduced him to Aristotle.


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