In contrast to previous state-centric accounts, this article sheds new transnational light on the 1919 Paris peace settlement through its investigation of proposals for transnational associations’ roles in the envisaged new world order. The popularity of some of these proposals, and their perceived potential to contribute towards a more democratic, legitimate and peaceful international order, stimulated their consideration during official negotiations at the Paris Peace Conference, and subsequent League of Nations practice was also perceived to have reflected some of the ideas put forward in the proposals. This article provides a typology of these proposals, and it critically evaluates the claims made with respect to their repercussions for democracy, legitimacy and peace. The article further elucidates how, despite their limitations, these proposals helped open up diplomacy to transnational associations both at the Paris Peace Conference and in the League of Nations era.