Activities performed in unison, like marching or dancing, increase loyalty to the group (Image: NAKI / PYMCA / Rex)

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HITLER and Mussolini both had the ability to bend millions of people to their fascist will. Now evidence from psychology and neurology is emerging to explain how tactics like organised marching and propaganda can work to exert mass mind control.

Scott Wiltermuth of Stanford University in California and colleagues have found that activities performed in unison, such as marching or dancing, increase loyalty to the group. “It makes us feel as though …