Any group or organization that works to undermine or overpower the lawful decisions of the government goes against the most basic principles of a free society. These groups give factions an unnatural amount of power, replacing the will of the whole nation with the will of a small but determined group. Depending on which faction wins at any given time, the government ends up serving the goals of that faction rather than making sound decisions that reflect the needs of everyone.
Even when these groups seem to serve the public good, they are likely over time to become powerful tools used by ambitious and dishonest men to take power away from the people. In the end, those same men will use these organizations to seize control of the government for themselves, destroying the very groups that helped them rise to power in the first place.
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When one faction takes power over another, the losing side seeks revenge, and this back-and-forth struggle has led to terrible violence and cruelty throughout history. This kind of conflict is itself a form of tyranny. But it also tends to lead to something even worse. As disorder and suffering grow, people begin to look for security by giving one powerful individual complete control. Sooner or later, the leader of the strongest faction uses that desperation to seize power for himself, on the ruins of public liberty.
Glossary
faction: a smaller group within a larger group that has its own ideas or goals
