The major point of this book is that agriculture is the key to creating a strong and wealth society. Therefore, we should probably say that "agriculture" would be the most important key word to capture such a strategy.
Another key word to capture such a strategy might be "receptivity." Diamond says that communities that thrive are those that are willing to use new technologies to which they are exposed. Such societies end up stronger and wealthier than those that are resistant to change.
Finally, you could use the key word "innovation." It is important for societies to innovate so that they can create new technologies rather than simply having to borrow technologies developed by others.