Is it a coincidence that people in high-octane jobs seem to have a streak of impulsivity, aggression and even unkindness? It is easy to assume that people with these character traits have simply chosen such work as their career, but is this fair? Instead, could it be that when people begin such jobs they have a completely different personality, yet over time, as chronic stress changes their brain wiring, their personality is completely altered? Science seems to suggest the latter. By Guest Writer Mithu Storoni, MD, PhD You can follow Mithu on Facebook via @BrainBoostCamp