The streetcar experiment is detailed as if you were driving a streetcar that couldn't stop and had the option of running over one or five workers, most would choose one person . Most rationalize this because of the idea that the needs of the many outweigh the needs of the few. Now, imagine that you are a passerby and you see a tram racing towards five workers, and your only option is to push a heavy man into the road to stop the car. Most would not be able to do so. Why? Shouldn't it be the same situation? The reason people can't push that man is because he's not part of this situation, and if you show him up and kill him, you're killing an innocent man. You feel the real damage instead of the situation with no other option. You are actually physically killing a man by pushing him, rather than removing the sensation of flipping a switch. The streetcar theory is an essential part of morality, because it shows how consequences cannot justify actions. People must evaluate whether the action is moral or not before evaluating the consequences. Pinker's "Moral Instinct" evaluates modern views of morality and how it is influenced by external forces such as culture and evolution. A universal morality will advance our race beyond the limits of belief and society. Morality is difficult to rationalize, but it is definitely possible with the help of basic reasoning