A Harvard professor is suggesting that bad behavior in the war-zone could be prevented  if just one person in the unit stepped forward to say, “Marines don’t do that.” Michael Wheeler, professor of management practice at Harvard Business School, posted a piece to his LinkedIn profile examining how someone’s decision-making can be changed in a matter of seconds. He cited the case of British Royal Marine Sgt. Alexander Blackman, who was recently sentenced to life in prison after being found guilty for killing an insurgent at close-range during a 2011 patrol in Afghanistan’s Helmand province. The act was captured on helmet cameras worn by…