It’s a chilly March morning in the undisclosed mid-Atlantic hotel hosting Palantir’s developer conference. The defense contractors, military officers, and corporate executives in attendance are unprepared for the weather; they’d assumed the previous day’s mid-70s temperatures would hold. A cold rain turns to steady snowfall, and Palantir passes out heavy blankets. As people move between open-air pavilions, it looks like they were pulled from shipwrecks. Nonetheless, spirits are high. To this sel...