Some people knew, others didn’t. “People know” is a nebulous and misleading concept. Today people know that vaccines are effective without causing autism, but u

Some people knew, others didn’t. “People know” is a nebulous and misleading concept. Today people know that vaccines are effective without causing autism, but um, yeah. Today people in much of the world don’t know or believe that smoking is harmful, and those places are the emerging markets for tobacco. Besides, there’s knowing, and accepting. See AGW. Edit: to clarify, people can be strongly influenced to disregard what is known in favor of what “feels right” or serves their perceived interests. Simply instilling knowledge in the absence of the ability to critically examine said knowledge is insufficient.