John Campbell, the (in)famous editor of Analog Science Fact/ Science Fiction mag in the 50s-60s (and probably some years before and after) had a theory about to

John Campbell, the (in)famous editor of Analog Science Fact/ Science Fiction mag in the 50s-60s (and probably some years before and after) had a theory about tobacco smoke and fires. He reasoned that for thousands of years, people had tried to avoid smoke: campfires, chimneys, and so forth. But suddenly they took to one kind of smoke, that from tobacco. Obviously--he reasoned--it must be good for you. I doubt he ever smoked weed.