[7][8][9] The founding was supported by a council of over 40 advisors including Ece Temelkuran,[10] Katrín Jakobsdóttir, Yanis Varoufakis,[11] Carola Rackete, Nick Estes, Vanessa Nakate, Noam Chomsky,[12] Arundhati Roy, Naomi Klein[13] Niki Ashton,[12] Rafael Correa, Fernando Haddad, Celso Amorim, and Alvaro Garcia Linera.

[19] The Cabinet draws its membership from the other two bodies, consisting of eight Council members: Srećko Horvat, Aruna Roy, Pierre Sané, Fatima Diallo, Rachmi Hertanti, Julian Aguon,[20] Renata Ávila and Scott Ludlum, as well as general coordinators David Adler and Varsha Gandikota-Nellutla.

[22] On 15 November 2021, the Progressive International launched their global observatory "as attacks on democracy escalate across the world" and "authoritarian leaders are getting organised to capture the courts, criminalise opposition, and rig the rules to hold onto power," said General Coordinator David Adler in a statement.

[23] The founding was endorsed by Noam Chomsky, Rafael Correa, Ertuğrul Kürkçü, Guillaume Long, Celso Amorim, Fernando Haddad, Jeremy Corbyn, Aruna Roy, Aída García-Naranjo and Andrés Arauz according to the Brazilian daily paper Folha de S.Paulo.

The same article included a statement from Adler which singled out Narendra Modi in India and Jair Bolsonaro in Brazil as being part of a wider network of authoritarian threats.

[34] On 9 March 2022, Progressive International organised their first Forum for Peace, in response to the "brutal invasion of Ukraine" and its escalation "toward intercontinental war.