^ "Sozialdemokratische Parteien gründen neues Bündnis".Archived from the original (PDF) on 4 March 2014. Sozialdemokratische Partei Deutschlands (SPD).
^ "A Progressive Network for the 21st Century" (PDF).Archived from the original on 30 June 2013. ^ "Gabriel hofft durch Parteijubiläum auf Motivationsschub".Archived from the original on 24 December 2013. "Berlin: Kanzlerin kommt zur 150-Jahr-Feier der SPD". "Sozialistisch war gestern, progressiv ist heute: SPD lädt zur Gründung eines internationalen Parteiennetzwerkes nach Leipzig". ^ "Social Democrats Seek Revival on 150th b-day".
The Dutch Labour Party also supported the formation of the organization, as did the Swiss Socialist Party, and the Social Democratic Party of Austria. Also present were representatives of the Indian National Congress, the Workers' Party of Brazil, and PASOK of Greece. They included Pier Luigi Bersani, leader of the Democratic Party of Italy Harlem Désir, Chair of the French Socialist Party Hermes Binner, Chair of the Argentine Socialist Party Peter Shumlin, Democratic Governor of Vermont and Mustapha Ben Jafar, Secretary General of the Tunisian Democratic Forum for Labour and Liberties. Īn initial Conference of the Progressive Alliance was held in Rome, Italy, on 14–15 December 2012, with representatives of 42 political parties attending. Gabriel had been critical of the Socialist International's admittance and continuing inclusion of undemocratic political movements into the organization. The first step towards the creation of the Progressive Alliance was the decision in January 2012 by Sigmar Gabriel, then chairman of the Social Democratic Party of Germany (SPD), to cancel payment of the SPD's £100,000 yearly membership fee to the Socialist International.