I certainly wouldn't say that critical thinking has vanished from society. It's a difficult thing to measure, but what we do know is that, as Ms. Hill referenced, the heart of critical thinking is intellectual humility. It is being willing to recognize that we might be wrong. It is being willing to set standards under which we would change our minds.
We do know that, in general, the English language media environment and, insofar as I know, the French language media environment have become more polarized. That remains less true in Canada than in the United States, but it has become more polarized than it was in the past.