What a neat idea!
A whole section dedicated to the following may be of use:
Criticizing or Critiquing - what does critical thinking entail?
From there, perhaps identify with subheadings the various aspects of identifying fallacious claims, arguments and unreasonable demands for individuals to forsake the apparently dreaded "spirit of independence". Youths could be provided with examples in history where this "spirit of oneness" lead to society's detriment. Perhaps contrast this with individuals who truly did serve as the proverbial grain of rice which tipped the scale - Rosa Parks, Martin Luther King Jr., Newton, Socrates, and yes - even Charles Taze Russell, who had the gall to fracture away from group-thinking and do what he believed was right. There is absolutely nothing reckless about standing up to the crowd (be it a political party, a social movement, or even a beloved religious organization) and saying "NO". That "no" will affect change. The future rests with the very youth reading this book. Ultimately, the book should demonstrate that there is much more truth, wisdom and hopefully happiness in taking the risk of thinking for oneself.