In 1911, Morgari inaugurated his activity as a "
diplomat of Socialism" with a trip to the
Far East, which would become his main preoccupation in the years of
World War I; he took part in preparing the
Zimmerwald Conference, celebrated the
October Revolution and
Bolshevist Russia, and signed the 1 April 1919 letter that declared the PSI adherence to the
Comintern. Nevertheless, he remained inside the PSI when its
Bolshevik factions left to form the
Italian Communist Party. He left the party in 1922 to join
Filippo Turati and
Claudio Treves in creating the
Unitary Socialist Party (PSU). With
Fascism and the
March on Rome came a debate among socialists over the conflict and pacifism: in 1934, Morgari showed himself to be a partisan of an understanding with the
Soviet Union, and called for
defeatism to be applied as a
revolutionary tactic in case Italy was to be led into war by
Benito Mussolini. As the PSU re-entered the PSI in 1930, he became a member of the PSI Executive Committee in 1939 (together with
Angelo Tasca and
Giuseppe Saragat), as well as editor-in-chief of
Avanti!. ==References==