A runaway trolley is about to kill five railroad workers. The only way to stop it is to shove a huge man next to you onto the tracks. Would you kill that man to save five?
That is one of the standard moral dilemmas that scientists are using to study how people decide between right and wrong. But is it the best example? When was the last time you faced a runaway trolley?
To see how people deal with more realistic choices, Joshua Greene, a psychologist at Harvard University, and his undergraduate student Katie Ransohoff, turned to medicine and public health.
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