A study published by, Journal of Personality and Social Psychology looked at education, personality, and life events in German students, ages 19 to 30, and found that Machiavellianism decreases as people age, and narcissism tends to stay constant. It is our life events and what becomes our triggers that signal the different trajectories of these two dark personality traits:  narcissism and Machiavellianism. More research is needed on these complex personality traits, and we’re standing by for what’s next.