Vaccinations and the war on science: Donald Trump's championing of the "anti-vaxer" cause takes advantage of scientific illiteracy
Science is a massive, ongoing human undertaking. It is a creative endeavour: the greatest scientific discoveries have involved wild guesses and hypotheses. But it also depends on rigor, self-criticism, and self-correction. The wild guesses must be tested against evidence. Science is the most dynamic of endeavours: the accepted claims of today may be overturned tomorrow. Ambitious scientists dream of changing our understanding of the world.
So how can someone make decisions that rely on science? If science is always changing, if claims are being tested and overturned, if tomorrow's discovery could change our whole way of looking at things, why should we believe anything scientists say today? How can a creative and dynamic endeavour become a source of legitimate authority to be followed? Most of us are not going to collect and analyze atmospheric data to test whether burning fossil fuels causes climate change, but we have to decide whether to press for reduced emissions based on what scientists are saying.
This decision of the ordinary person to trust scientific authority is made even more difficult because scientific authority can be abused, and has been abused in the past. Take scientific authority in the area of mental illness. The manual of mental illness produced by the American Psychiatric Association is the famous DSM, the Diagnostic and Statistical Manual of Mental Disorders. We are currently (as of 2013) on the DSM-V. Prior to a change made in the DSM-II in 1973, 'homosexuality' was defined as a mental illness. Before the DSMs, in the 19th century, an American physician defined 'drapetomania': a mental illness that caused African-American slaves to try to escape. Diagnoses of 'hysteria', 'frigidity', and many others were used to control women since the 19th century. Psychologist Bruce Levine has argued that diagnoses of ADHD and ODD are similar tools that “psychopathologize” and “medicate” people who are “natural anti-authoritarians”, “before they achieve political consciousness of society's most oppressive authorities.”