[citation needed] Among its founders were prominent militants of the Sandinista National Liberation Front (FSLN) who separated from the political party because of disagreements with the leadership under Daniel Ortega.

These include former vice president Sergio Ramírez, who served as the first president of the MRS, Dora María Téllez, Luis Carrión Cruz, Luis Felipe Pérez Caldera, Leonor Arguello, Reynaldo Antonio Téfel,[citation needed] and Herty Lewites, who was the presidential candidate of the MRS until his sudden death four months prior to the election.

In 2016 the MRS joined the Progressive Alliance,[citation needed] an international organization of labor, social democrats, left parties, organisations and movements from around the world.

During 1994 and 1995, the MRS's representatives at the National Assembly participated actively in drafting the constitutional reforms that gave Nicaragua a new legal framework to move towards and to consolidate democracy.

[4][5] Herty Lewites Rodríguez's death greatly affected the possibilities for the MRS Alliance, with Jarquín Calderón polling in third place with between 10% and 15%, but in the end only came fourth with 6.4% of the votes.

As a member of the FAD, the MRS is part of the Blue and White National Unity (UNAB), launched on 4 October 2018 as a broad alliance of 43 social and political organizations and movements in opposition to President Ortega.

[8] In the run-up to the 2021 Nicaraguan general election, four MRS leaders were arrested and imprisoned,[2] including party president Suyén Barahona and party founders Dora María Téllez and Hugo Torres Jiménez (aged 65 and 73), as well as Unamos leader Víctor Hugo Tinoco (aged 69), a former assistant foreign minister and former ambassador to the United Nations[9] and Unamos member Tamara Dávila.