Customs wars, announcement of the annexation of another countries, the conscious humiliation of the president of Ukraine... Donald Trump's tactics shock and destabilize the global scene. However, his negotiating and manipulative techniques are well known to social psychologists. Calling president Volodymyr Zelenski ‘dictator’, claiming that ‘iplays with planet War III’, threats of imposing a 200 percent taxation on French champagne and European wines, a desire for ‘annuity’ [...]
