Don't Be Self Silencing as Your Freedoms are Destroyed!

What tactic do the radicals of ISIS, the revolutionaries of Maoist China and the current Social Justice movement have in common? All of these movements have attempted to distort the perception of history in their efforts to affect social change. The first two examples led to massive chaos, destruction and suffering that affects much of the world even to the present day. Will the third example come to a similar conclusion? How can such a disaster be prevented?