Protecting the world from tyranny... Suuure. Only the tyrants, the enemy that will not stop before it enslaves us all is not what they want us to think. It is much closer...
Here's what John Dewey says:
"The serious threat to our democracy is not the existence of foreign totalitarian states. It is the existence within our own personal attitudes and within our own institutions of conditions which have given a victory to external authority, discipline, uniformity and dependence upon The Leader in foreign countries. The battlefield is also accordingly here - within ourselves and our institutions."
Dewey said it in 1939, just as the world was about to witness the cataclysm of WWII. The truth does not age. Today we can substitute the names of our own tyrants with those of the past and the rest will be... history in replay.