Will there be a pill (or vaccination?) that everyone could take that would guarantee moral behavior?

Some people are altruistic, while others are not. Why do some people risk their lives to help others, when some won’t even bother to dial 911? When researchers there took two rats who shared a cage and trapped one of them in a tube that could be opened only from the outside, the free rat usually tried to open the door, eventually succeeding. But only 23 of 30 did this, meaning that rat responses in emergencies–like human responses–vary.
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