RT Journal Article SR Electronic T1 To feel what others feel: two episodes from 18th century medicine JF Medical Humanities JO J Med Humanit FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 34 OP 37 DO 10.1136/jmh.2011.007203 VO 37 IS 1 A1 Justman, Stewart YR 2011 UL http://mh.bmj.com/content/37/1/34.abstract AB In the late 18th century two medical fashions—Mesmerism in France and the Perkins ‘tractor’ in the USA and England—appealed to the principle that a single universal force acts on all of us and is responsible for health and illness. This principle served both fashions well, as it made it all the easier for those who came within their force fields to experience the sort of sensations that other subscribers to the fashion also seemed to feel. The first research on what is now known as the placebo effect was in connection with these two movements. The propensity to feel what we suppose or imagine that others like us feel remains even now one of the channels of the placebo effect.