Elon Musk's fourth appearance on the Lex Fridman Podcast. The conversation primarily focuses on Elon Musk's views on war, AI, and the future of humanity. Musk argues that war is a fundamental part of human nature, but also discusses ways to promote peace, such as using conspicuous acts of kindness. He expresses concern about the dangers of artificial general intelligence (AGI) and the potential for nuclear war, but also expresses optimism about the potential for AI to help us understand the universe. The conversation also covers Musk's views on politics, including his thoughts on the 2024 presidential election and his criticisms of "woke" culture. Finally, the conversation touches on Musk's work with Tesla and SpaceX, highlighting his efforts to develop self-driving cars and robots, as well as his vision for humanity to become a multi-planetary species.