ADU emerged in 2019 from the left-wing split of
Civic Commitment, which had obtained 7.5% of the vote and three seats in the
2018 regional election. The party's early leader was
Daria Pulz, who had directed the Historical Institute of Resistance and Contemporary Society in Aosta Valley before entering into politics and being elected to the Regional Council. In the
2020 regional election the party was excluded from the ballot for technical reasons. In the
2022 general election the party was a founding member of
Open Aosta Valley (VdAA), along with
Democratic Area – Autonomist Left (AD–GA), the
Five Star Movement (M5S) and
Italian Left (SI), the latter forming a federative pact with ADU. The coalition obtained 10.9% of the vote for the
Chamber of Deputies, with AD–GA's
Erika Guichardaz as candidate, and 10.0% of the vote for the
Senate, with Daria Pulz as candidate. Later, SI broke with ADU and established the
Greens and Left Alliance also in Aosta Valley. In the
2025 regional election VdAA, composed of ADU, AD–GA and M5S, obtained 5.6% of the vote and no seats; Guichardaz and Pulz were the most voted candidates. == Leadership ==