"I've worked very hard in this book to keep the lines of communication open. I don't want to turn someone away from this information for partisan political reasons"

This quote by Jared Diamond suggests that he has put a great deal of effort into making sure that the details in his book is accessible to everyone, no matter their political views. He does not want to omit anyone from the details he is providing, and he does not want to be viewed as prejudiced or partisan. He wants to guarantee that the info exists in a manner that is open and unbiased, so that everyone can take advantage of it. This quote shows Diamond's dedication to providing objective information and his desire to ensure that everyone has access to it. He wishes to ensure that the information is presented in such a way that is open and accessible to all, despite their political views.