READ THE FULL ARTICLE ON DISCINSIGHTS BY PEOPLEKEYS. Dr. William Marston developed his DISC theory while at Harvard University as a method of identifying major human personality traits and translating them into predictable behaviors. It is true that people can be predictable, but they are also predictably different. Being able to read through their personality differences is a key to good communication and building successful relationships, partnerships, families… Have you determined your DISC personality, yet? […]