Final answer:
The class focuses on exploring new perspectives through critical thinking and understanding dynamic balance within biological systems, which suggests its overarching theme is dynamic balance and rich cognitive life.
Step-by-step explanation:
The overarching theme of the class seems to revolve around providing students with new perspectives on various topics including life's organization, human nature, and critical thinking. The course encourages deep learning through critical reflection, fostering a rich cognitive life, and understanding dynamic balance in biological systems. Given the content provided, themes such as complexity, homeostasis, the brain as an inference machine, and exploration of humanity through different genres of the humanities suggest that the overarching theme of this class is a combination of dynamic balance and rich cognitive life (option 3).