With a little bit of observation it is easy to see the principles in this
book explain far more about the society around us than what one may think from
the original scope of their research.  This website is about making those
observations obvious.
Most of the first two pages of the book are below.  This is sufficient
to explain the thesis and allow you to see the behaviors in others. 
Specific examples from modern day life are given in the links/buttons above.
  
  Chapter 1
  A man with a conviction is a hard man to change.  Tell him you
  disagree and he turns away.  Show him facts or figures and he questions
  your sources.  Appeal to logic and he fails to see your point.
  We have all experienced the futility of trying to change a strong
  conviction, especially if the convinced person has some investment in his
  belief.  We are familiar with the variety of ingenious defenses with
  which people protect their convictions, managing to keep them unscathed
  through the most devastating attacks.
  But man's resourcefulness goes beyond simply protecting a belief. 
  Suppose an individual believes something with his whole heart; suppose further
  that he has a commitment to this belief, that he has taken irrevocable actions
  because of it; finally, suppose that he is presented with evidence,
  unequivocal and undeniable evidence, that his belief is wrong: what will
  happen?  The individual will frequently emerge, not only unshaken, but
  even more convinced of the truth of his beliefs than ever before. 
  Indeed, he may even show a new fervor about convincing and converting other
  people to his view.
  How and why does such a response to contradictory evidence come
  about?  This is the question on which this book focuses.  We hope
  that by the end of the volume, we will have provided an adequate answer to the
  question, an answer documented by data.
  Let us begin by stating the conditions under which we would expect to
  observe increased fervor following the disconfirmation of a belief. 
  There are five such conditions.
  
    - A belief must be held with deep conviction and it must have some
      relevance to action, that is, to what the believer does or how he behaves.
 
    - The person holding the belief must have committed himself to it; that
      is, for the sake of his belief, he must have taken some important action
      that is difficult to undo.  In general, the more important such
      actions are, and the more difficult they are to undo, the greater is the
      individual's commitment to the belief.
 
    - The belief must be sufficiently specific and sufficiently concerned with
      the real world so that events may unequivocally refute the belief.
 
    - Such undeniable disconfirmatory evidence must occur and must be
      recognized by the individual holding the belief.
      The first two of these conditions specify the circumstances that will make
      the belief resistant to change.  The third and fourth conditions
      together, on the other hand, point to factors that would exert powerful
      pressure on a believer to discard his belief.  It is, of course,
      possible that an individual, even though deeply convinced of a belief, may
      discard it in the face of unequivocal disconfirmation.  We must
      therefore, state a fifth condition specifying the circumstances under
      which the belief will be discarded and those under which it will be
      maintained with new fervor. 
    - The individual believer must have social support.  It is unlikely
      that one isolated believer could withstand the kind of disconfirming
      evidence we have specified.  If, however, the believer is a member of
      a group of convinced persons who can support one another, we would expect
      the belief to be maintained and the believers to attempt to proselyte or
      to persuade nonmembers that the belief is correct.
 
  
  These five conditions specify the circumstances under which increased
  proselyting would be expected to follow disconfirmation.