Objectivism, the philosophical system developed by Ayn Rand, is a central theme in the podcast episodes discussed. Rand's novel 'Atlas Shrugged' is the focus of the first episode, where host David Runciman delves into Rand's objectivist principles and their lasting influence, particularly among Silicon Valley tech titans.

The second episode, from the 'Srsly Wrong' podcast, frequently mocks and lampoons the tenets of Objectivism as presented in 'Atlas Shrugged'. The third episode features a debate between Yaron Brook, an Objectivist, and Yoram Hazony, a national conservative, further exploring the philosophical divide between Objectivism and other political ideologies.

Overall, these podcast episodes provide a deep dive into Ayn Rand's influential but controversial philosophy of Objectivism and its far-reaching impacts.