When did we become so blooming closed minded?

I remember a particular teacher during my school career who used to shout at us, “QUESTION EVERYTHING”, “NEVER ACCEPT THE STATUS QUO”, “NEVER ASSUME YOU’RE RIGHT”. We giggled and pretended to ignore her, too cool for school at the back of the class. But somewhere, sometime, somehow, those words have stayed with me and I’ve tried to pass them on to my kids.