Physics does not change the nature of the world it studies and no science of behavior can change the essential nature of man even though both sciences yield technologies with a vast power to manipulate the subject matters.
If you walk down the street and smile at someone that will get passed on to the next person. That has the power to change someone's day.
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The creative destruction that social media is currently unleashing will change more than technology or the leader board of the Fortune 100. It is driving a qualitative shift in the nature of relationships between brands and their customers.