The United States’ tradition of freedom and liberty, its openness to outside ideas, and our highest value, freedom of speech, ended up making all America vulnerable to those who would exploit those ideals. We welcomed the Frankfurt School. We accepted them with open arms. They took full advantage. They walked right into our cultural institutions, and as they started to put in place their leadership, their language, and their lexicon, too many chose to ignore them. And the most dangerous thing you can do with a driven leftist intellectual clique is to ignore it.

