In 1633, opposition to the common viewpoint could mean death. This was the case with Galileo when he proposed that the Earth revolved around the sun. He was tried for heresy. Of course things are different today. People who question dogma are no longer burnt at the stake. Instead, they’re branded as having suspect motives, as reactionaries or simply as nutcases. Consider global warming. The common viewpoint is that man-made carbon dioxide is to blame, but the Earth has been through ice ages and periods of global warming for millions of years.