You run to catch a subway train that has just pulled into the station. Being that this is a weekend, the next train could be many minutes away. Someone is fumbling at the turnstile, makes it through, and is running towards your car with you standing at the door. The bell goes and the doors start to close. The conductor is yelling to not hold the doors, as it holds up the train and the system. But you want to help this person who is running towards the train by holding the door for them. Which do you do? What is the greater good? The health of the system as a whole or the health of society due to small acts of kindness on a personal level? Anyone?