If you were a peer of Professor Diamond and he just told you he was embarking on this 30-year global journey, what kind of *evidence* or *types of comparisons* would you expect him to investigate to uncover the root causes of global inequality, given the ambition of his project?

Synthesized answer

Given the ambition of his project to answer why the world is so unequal, a peer of Professor Diamond embarking on a 30-year global journey would expect him to investigate evidence and make comparisons that address the fundamental drivers of societal development and power imbalances across continents. The passages state that Professor Diamond traveled the globe for over 30 years trying to answer this question [1].

While the passages don't explicitly list the specific types of evidence or comparisons he would investigate, the title itself, "Guns, germs, and steel," suggests that these elements are central to his inquiry. Therefore, one might expect him to examine historical and geographical factors related to the availability and development of these resources, as well as their impact on different societies' ability to conquer, resist disease, and build complex civilizations [1]. The passages frame the book as an "epic detective story" exposing why the world is so unequal, implying a broad scope of investigation into the root causes.

Synthesized from the book passages below. Chat with the book on Feynman for follow-up.