Why is ain't ought, or: Is Homo sapiens a rational humanist?

Although the critique of disputable norms is largely legitimate in the cognitive realm, the role of social norms is a different one. Darley, Zimbardo, Milgram, and CNN have compellingly demonstrated that humans are not always humane. But the very cognitive ability to distinguish between “is” and “ought” shows that there is behavioral plasticity, and space for education, inoculation, and learning.