How do doctors around the world agree on a complex disease? Michele Solis digs into the history of schizophrenia to find out. Michele reports for Distillations from @SciHistoryOrg on how a disease that is diagnosed by behavior was internationally defined. It took a global village with scientists from Nigeria to India to Czechoslovakia to work out the definition that clinicians from different countries and cultures could agree on. Michele tells us how it all came about. image: mensatic