depends on what you mean by always, but looking back at how this was handled re: tobacco, leaded gasoline, and climate change (pre 2000) should give you some id

depends on what you mean by always, but looking back at how this was handled re: tobacco, leaded gasoline, and climate change (pre 2000) should give you some idea. As far as I personally can see, it's been like this for a large portion of the 1900s at least.