I recently came across a video posted by the Federalist Society of a talk given by ARI’s Onkar Ghate on selfishness. If you have read Ayn Rand or listened to other talks by Dr. Ghate or Yaron Brook, much of the information covered in this talk will be familiar, but I find it is often (always?) helpful to revisit ideas you are familiar with in order to achieve a better understanding of them.
In this case, this deeper understanding came when Onkar answered the first question in the Q&A