A man just wandered through a G20 summit alone, holding a drink, while everyone else worked the room. He runs a company worth roughly $400 billion. And getting frozen out of rooms exactly like this one is how he built it. Alex Karp has no computer science background. He studied philosophy at Haverford, got a law degree at Stanford he later called the worst three years of his adult life, then moved to Frankfurt and wrote a doctoral dissertation in German. Peter Thiel picked him to run Palantir…