Over the years, many leaders have become frustrated with millennials because they’re not as cause-oriented as they were sold to be. I remember someone once complaining to me, “Millennials aren’t activists. They’re slacktivists!” I see his point. Still, young people do have a higher propensity toward causes than generations before. But what many leaders don’t understand is this: Millennials aren’t drawn to causes. They’re drawn to cause communities. Communities, Not Causes Millennials don’t volunteer as individuals. They volunteer as groups.…