Political Correctness Gone Mad?

"¡®Without free speech there is no true thought.¡¯ -Jordan Peterson. ¡®You¡¯re telling me I¡¯m being sensitive, and students looking for safe spaces that they¡¯re being hypersensitive. If you¡¯re white, this country is one giant safe space.¡¯ -Michael Eric Dyson. Is political correctness an enemy of free speech, open debate and the free exchange of ideas? Or is it a progressive force, eroding the dominant power relationships and social norms that exclude marginalised groups from society?