Styling itself as a "liberal, social, European, humanist and reformist" party, Agir was founded by a group of 19 established politicians as an alternative to The Republicans.

Following the defeat of Les Républicains (LR) candidate François Fillon in the first round of the 2017 French presidential election and the ascension of Laurent Wauquiez, perceived as coming from the right wing of Les Républicains, to the leadership of the party, 19 politicians from LR and the centre-right Union of Democrats and Independents formed the group.

[17] In the run-up to the 2022 French presidential election, Agir joined and formed part of the Ensemble Citoyens coalition, which supported President Emmanuel Macron in his re-election bid.

Ultimately, Agir merged into Macron's party as it reformed and rebranded under the name Renaissance on 17 September 2022.

[19] Agir was identified as part of centre-right politics, defining itself as pro-European, liberal and humanist, and rejecting the "identitarian, authoritarian, eurosceptic and ultra-conservative" right.