As I mull over a few ideas for a book project I'm considering, I wonder why it's so hard to find people who are genuinely interested in working to find common ground between different groups - you know, instead of everyone being in their own ideological silo, with their own ideological tribe, hurling insults at the other guys. And I realize that it's not in the interest of parties and partisan activists to encourage the discovery of common ground because they thrive on clearly delineated conflicts between groups. Without an "us vs them" mentality, political parties would not do so well, and as well know, the first order of business for any organization is to stay in business.