Whether we consider Nazi ...

Whether we consider Nazi Germany or Abu Ghraib prison, there were many people who observed what was happening and said nothing. At Abu Ghraib, one photo shows two soldiers smiling before a pyramid of naked prisoners while a dozen other soldiers stand around watching passively. If you observe such abuses and don't say, "This is wrong! Stop it!" you give tacit approval to continue. You are part of the silent majority that makes evil deeds more acceptable.
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 Philip Zimbardo

Quotes from the same author

Boys' brains are being digitally rewired for change, novelty, excitement and constant arousal. That means they're totally out of sync in traditional classes, which are analog, static, interactively passive.
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 Philip Zimbardo
Boys are 30 percent more likely than girls to drop out of school. In Canada, five boys drop out for every three girls. Girls outperform boys now at every level, from elementary school to graduate school.
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 Philip Zimbardo
Most of us hide behind egocentric biases that generate the illusion that we are special. These self-serving protective shields allow us to believe that each of us is above average on any test of self-integrity. Too often we look to the stars through the thick lens of personal invulnerability when we should also look down to the slippery slope beneath our feet.
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 Philip Zimbardo
Majority decisions tend to be made without engaging the systematic thought and critical thinking skills of the individuals in the group. Given the force of the group's normative power to shape the opinions of the followers who conform without thinking things through, they are often taken at face value. The persistent minority forces the others to process the relevant information more mindfully. Research shows that the deciscions of a group as a whole are more thoughtful and creative when there is minority dissent than when it is absent.
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 Philip Zimbardo
Research shows that the deciscions of a group as a whole are more thoughtful and creative when there is minority dissent than when it is absent.
 See image
 Philip Zimbardo