That scene when the scientist says: "Billions of puppets with poisond minds permamently fixed on one unifying goal: to spread the infection to every human alive by any means necessary" - meanwhile the camera changes to the audience which is sitting frozen, not moving, as if they are already puppets.
That was some brilliant work, and the scientist actors just a deligt to listen to.
I thought that scene was a little forced. Just because there's no reason from the perspective of 1968 to assume that the fungus would be resistant to anti-fungal meds. And even less reason to think that a few degrees of climate change would cause that adaptation when if that were true the fungus in death valley would have adapted a long time ago. Not to mention ignoring the difference in complexity between human and ant brains.