Once, as he worked on a complicated project late in the evening, full of manic energy despite the hour, Brown picked up the phone to call a junior associate at home with a pressing question. A colleague stopped Brown before he could dial. “Peter, you can’t call him,” he said. “It’s two a.m.” Brown looked confused, forcing the colleague to explain himself. “He doesn’t get paid enough to answer questions at two a.m.” “Fine, let’s give him a raise, then,” Brown replied. “But we have to call him!”