Philosophy
The Paradox of Tolerance in Open Democratic Societies
Quick fact
Karl Popper, in his 1945 book The Open Society and Its Enemies, asserted that unlimited tolerance leads to the demise of tolerance—if a society tolerates the intolerant, they will exploit that openness to gain power and eventually suppress all dissenting views.
Why this is interesting
You believe in free speech, but should that include allowing people to preach that democracy should be abolished? If you tolerate everyone, how do you stop the intolerant from destroying tolerance altogether?